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 A051455 #6 Jul 02 2025 16:01:58 %S A051455 1,1,4,1,1,7,13,12,1,20,25,1,10,45,24,1,1,13,50,112,161,154,98,40,1, %T A051455 63,162,273,315,252,138,1,16,225,435,588,567,390,60,1,660,1023,1155, %U A051455 957,1,19,111,396,1683,2178,2112,825,319,84,1,130,507,3861,4290,1144,403,1 %N A051455 (Terms in A029623)/2. %e A051455 1; %e A051455 1; %e A051455 4,1; %e A051455 1; %e A051455 7,13,12,1; %e A051455 20,25,1; %e A051455 10,45,24,1; %e A051455 1; %e A051455 13,50,112,161,154,98,40,1; %e A051455 63,162,273,315,252,138,1; %e A051455 16,225,435,588,567,390,60,1; %e A051455 660,1023,1155,957,1; %p A051455 for n from 0 to 12 do %p A051455 for k from 0 to n do %p A051455 a := A029618(n,k) ; %p A051455 if type(a,'even') then %p A051455 printf("%d,",a/2) ; %p A051455 end if; %p A051455 end do: %p A051455 printf("\n") ; %p A051455 end do: # _R. J. Mathar_, Jul 08 2015 %Y A051455 A029623, A029618. %K A051455 nonn,easy,tabf %O A051455 0,3 %A A051455 _James Sellers_