erikbaxstrom/15--538riddler--trapezoidal-numbers

15--538Riddler--Trapezoidal-Numbers

Riddler express from February 11, 20222

https://fivethirtyeight.com/features/can-you-prime-the-cube/

The smallest of each n-trapezoidal number for numbers up to 5 million: {1: 3, 2: 9, 3: 15, 4: 45, 5: 45, 6: 105, 7: 105, 8: 225, 9: 315, 10: 315, 11: 315, 12: 945, 13: 945, 14: 945, 15: 945, 16: 1575, 17: 1575, 18: 2835, 19: 2835, 20: 3465, 21: 3465, 22: 3465, 23: 3465, 24: 10395, 25: 10395, 26: 10395, 27: 10395, 28: 10395, 29: 10395, 30: 10395, 31: 10395, 32: 17325, 33: 17325, 34: 17325, 35: 17325, 36: 31185, 37: 31185, 38: 31185, 39: 31185, 40: 45045, 41: 45045, 42: 45045, 43: 45045, 44: 45045, 45: 45045, 46: 45045, 47: 45045, 48: 121275, 49: 121275, 50: 121275, 51: 121275, 52: 121275, 53: 121275, 54: 135135, 55: 135135, 56: 135135, 57: 135135, 58: 135135, 59: 135135, 60: 135135, 61: 135135, 62: 135135, 63: 135135, 64: 225225, 65: 225225, 66: 225225, 67: 225225, 68: 225225, 69: 225225, 70: 225225, 71: 225225, 72: 405405, 73: 405405, 74: 405405, 75: 405405, 76: 405405, 77: 405405, 78: 405405, 79: 405405, 80: 675675, 81: 675675, 82: 675675, 83: 675675, 84: 675675, 85: 675675, 86: 675675, 87: 675675, 88: 675675, 89: 675675, 90: 675675, 91: 675675, 92: 675675, 93: 675675, 94: 675675, 95: 675675, 96: 1576575, 97: 1576575, 98: 1576575, 99: 1576575, 100: 1576575, 101: 1576575, 102: 1576575, 103: 1576575, 104: 1576575, 105: 1576575, 106: 1576575, 107: 1576575, 108: 2027025, 109: 2027025, 110: 2027025, 111: 2027025, 112: 2027025, 113: 2027025, 114: 2027025, 115: 2027025, 116: 2027025, 117: 2027025, 118: 2027025, 119: 2027025, 120: 2297295, 121: 2297295, 122: 2297295, 123: 2297295, 124: 2297295, 125: 2297295, 126: 2297295, 127: 2297295, 128: 3828825, 129: 3828825, 130: 3828825, 131: 3828825, 132: 3828825, 133: 3828825, 134: 3828825, 135: 3828825, 136: 3828825, 137: 3828825, 138: 3828825, 139: 3828825, 140: 3828825, 141: 3828825, 142: 3828825, 143: 3828825}