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 A145974 #13 Jun 12 2023 02:39:23 %S A145974 1,1,3,5,14,27,73,151,400,862,2254,4989,12932,29165,75135,171805, %T A145974 440620,1018240,2602600,6064810,15460920,36272270,92276210,217693425, %U A145974 552878074,1310422012,3323477928,7908572351,20034349880,47837048643,121063495921,289930092391,733118166228,1760303403020 %N A145974 Row sums of triangle A145973. %C A145974 Triangle A145973 is the square of A053121. %C A145974 Equals row sums of triangle A153585. - _Gary W. Adamson_, Dec 28 2008 %p A145974 A145974 := proc(n) %p A145974 add(A145973(n,k),k=0..n) ; %p A145974 end proc: # _R. J. Mathar_, Mar 03 2013 %Y A145974 Cf. A053121, A145973, A153585. %K A145974 nonn %O A145974 0,3 %A A145974 _Gary W. Adamson_ and _Roger L. Bagula_, Oct 25 2008 %E A145974 Extended beyond a(10) by _R. J. Mathar_, Mar 03 2013 %E A145974 a(25) corrected and more terms from _Georg Fischer_, Jun 11 2023