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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. 5

%I #17 Jan 02 2023 12:30:47

%S 0,5,23,62,62,723,1578,1578,8139,39644,94323,94323,1317783,1680515,

%T 2025699,3205598,23003999,113333163,170717819,1710518799,3608109348,

%U 16655876439,24090452279

%N 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.

%C Indices of records in A176873 (with repetitions).

%H Max Alekseyev, <a href="http://list.seqfan.eu/oldermail/seqfan/2010-April/004449.html">Proof that the sequence is infinite</a>. [Sequence Fans mailing list, Apr 26 2010.]

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

%Y Cf. A176873, A176774.

%K hard,more,nonn

%O 3,2

%A _Vladimir Shevelev_ and _Max Alekseyev_, Apr 27 2010

%E Edited by _N. J. A. Sloane_, Apr 29 2010

%E a(19)-a(22) from _Jon E. Schoenfield_, Aug 08 2010

%E a(23)-a(25) from _Donovan Johnson_, Jan 24 2011

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Last modified April 25 06:42 EDT 2024. Contains 371964 sequences. (Running on oeis4.)