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 A225325 #23 May 10 2013 11:30:27 %S A225325 5,15,30,135,385,490,1255,1575,3010,4565,12310,26015,31185,75175, %T A225325 173525,386155,715220,831820,1121505,1741630,2323520,3087735,3554345, %U A225325 4697205,7089500,13848650,20506255,26543660,49995925,92669720,133230930,169229875 %N A225325 Partition numbers of the form 5k. %C A225325 Intersection of A008587 and A000041. %H A225325 Paul Tek, <a href="/A225325/b225325.txt">Table of n, a(n) for n = 1..10000</a> %F A225325 a(n) = 5*A217725(n). - _Omar E. Pol_, May 08 2013 %e A225325 15 is in the sequence because 5*3 = 15 and 15 is a partition number: p(7) = A000041(7) = 15. %t A225325 Select[PartitionsP[Range[300]], Mod[#, 5] == 0 &] (* _T. D. Noe_, May 05 2013 *) %o A225325 (PARI) for(n=9, 1e3, t=numbpart(n); if(t%5, , print1(t", "))) \\ _Charles R Greathouse IV_, May 08 2013 %Y A225325 Cf. A000041, A008587, A052001, A072871, A087183, A225324, A225326, A225327, A225358, A225360, A127544, A225361 %K A225325 nonn %O A225325 1,1 %A A225325 _Omar E. Pol_, May 05 2013