cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A036095 Centered cube numbers: a(n) = (n+1)^17 + n^17.

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%I A036095 #13 Sep 08 2022 08:44:52
%S A036095 1,131073,129271235,17309009347,780119322309,17689598897861,
%T A036095 249557173431943,2484430327672455,18928981513351817,
%U A036095 116677181699666569,605447028499293771,2724058135239730763,10869027026121774925
%N A036095 Centered cube numbers: a(n) = (n+1)^17 + n^17.
%C A036095 Never prime, as a(n) = (2n + 1) * (n^16 + 8n^15 + 64n^14 + 308n^13 + 1036n^12 + 2576n^11 + 4900n^10 + 7274n^9 + 8518n^8 + 7896n^7 + 5776n^6 + 3300n^5 + 1444n^4 + 468n^3 + 106n^2 + 15n + 1). Semiprime for n in {1, 5, 21, 29, 33, ...}. - _Jonathan Vos Post_, Aug 27 2011
%D A036095 B. K. Teo and N. J. A. Sloane, Magic numbers in polygonal and polyhedral clusters, Inorgan. Chem. 24 (1985), 4545-4558.
%H A036095 Vincenzo Librandi, <a href="/A036095/b036095.txt">Table of n, a(n) for n = 0..10000</a>
%o A036095 (Magma) [(n+1)^17+n^17: n in [0..20]]; // _Vincenzo Librandi_, Aug 28 2011
%Y A036095 Cf. A000040, A036085, A036087, A036088, A036089, A036090, A036091, A036092, A036093, A100267, A154535, A100266, A152913, A194155, A194185, A194216.
%K A036095 nonn,easy
%O A036095 0,2
%A A036095 _N. J. A. Sloane_