A217917 Odd numbers that appear in sequence A217916.

1, 5, 9, 11, 15, 17, 27, 29, 39, 41, 47, 49, 55, 61, 65, 69, 73, 79, 85, 89, 93, 111, 117, 119, 125, 137, 149, 153, 155, 161, 175, 181, 191, 193, 195, 211, 227, 231, 243, 255, 267, 269, 275, 279, 287, 295, 301, 307, 315, 317, 329, 335, 347, 349, 355, 357, 359, 361, 365

Offset: 1

Author

Paul D. Hanna, Mar 04 2013

Keywords

• nonn

Links

• Paul D. Hanna, Table of n, a(n) for n = 1..286

Crossrefs

Cf. A217916.

Formula

a(n) = A217916( (n+1)*(n+2)/2 - 1 ) for n>=1.