A176874 Minimal nonnegative integer that cannot be represented as the sum of an m-gonal and a k-gonal number for any k,m less than n.

0, 5, 23, 62, 62, 723, 1578, 1578, 8139, 39644, 94323, 94323, 1317783, 1680515, 2025699, 3205598, 23003999, 113333163, 170717819, 1710518799, 3608109348, 16655876439, 24090452279

Offset: 3

Author

Vladimir Shevelev and Max Alekseyev, Apr 27 2010

Keywords

• hard
• more
• nonn

Comments

Indices of records in A176873 (with repetitions).

Links

• Max Alekseyev, Proof that the sequence is infinite. [Sequence Fans mailing list, Apr 26 2010.]

Crossrefs

Cf. A176873, A176774.

Formula

a(n) = smallest integer s such that A176873(s) >= n.

Extensions

Edited by N. J. A. Sloane, Apr 29 2010

a(19)-a(22) from Jon E. Schoenfield, Aug 08 2010

a(23)-a(25) from Donovan Johnson, Jan 24 2011