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

3,2

Comments

Indices of records in A176873 (with repetitions).

Links

Table of n, a(n) for n=3..25.

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

Formula

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

Crossrefs

Cf. A176873, A176774.

Sequence in context: A159241 A179094 A373538 * A331987 A241765 A106956

Adjacent sequences: A176871 A176872 A176873 * A176875 A176876 A176877

Keyword

hard,more,nonn

Author

Vladimir Shevelev and Max Alekseyev, Apr 27 2010

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

Status

approved