A074136 Main diagonal of triangle A074135.

1, 4, 7, 13, 18, 21, 28, 40, 49, 64, 75, 81, 94, 115, 130, 138, 155, 182, 201, 211, 232, 265, 288, 300, 325, 364, 391, 433, 462, 477, 508, 556, 589, 606, 641, 695, 732, 751, 790, 850, 891, 912, 955, 1021, 1066, 1089, 1136, 1208, 1257, 1282, 1333, 1411, 1464

Offset: 1

Author

Amarnath Murthy, Aug 27 2002

Keywords

• nonn
• easy
• less

Crossrefs

Cf. A074135.