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.
%I A086732 #25 Sep 08 2022 08:45:11 %S A086732 1,5,13,29,54,97,161,257,402,604,896,1299,1866,2616,3665,5031,6891, %T A086732 9290,12498,16600,22008,28841,37740,48919,63294,81230,104048,132355, %U A086732 168048,212070,267105,334671,418486,520857,647081,800531,988510,1216159 %N A086732 Convolution of A000203 with partition function (A000041) of positive integers. %C A086732 Another version of the convolution of A000203 but starting from A000041(0) = 1 is given by the nonzero terms of A066186. - _Omar E. Pol_, Feb 13 2021 %H A086732 Harvey P. Dale, <a href="/A086732/b086732.txt">Table of n, a(n) for n = 1..1000</a> %F A086732 a(n) = (n+1)*A000041(n+1) - A000203(n+1). - _Vladeta Jovovic_, Apr 08 2006 %F A086732 a(n) = A066186(n+1) - A000203(n+1). - _Omar E. Pol_, Feb 13 2021 %t A086732 Table[n PartitionsP[n]-DivisorSigma[1,n],{n,2,40}] (* _Harvey P. Dale_, Jun 28 2012 *) %o A086732 (Magma) [ (n+1)*NumberOfPartitions(n+1)-SumOfDivisors(n+1): n in [1..38] ]; // _Klaus Brockhaus_, Jul 07 2009 %o A086732 (PARI) a(n) = (n+1)*numbpart(n+1) - sigma(n+1); \\ _Michel Marcus_, Feb 19 2018 %Y A086732 Cf. A000041, A066186, A000203, A162329. %K A086732 nonn %O A086732 1,2 %A A086732 _Jon Perry_, Jul 29 2003 %E A086732 More terms from _Klaus Brockhaus_, Jul 07 2009 %E A086732 Definition clarified by _Omar E. Pol_, Feb 13 2021