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 A297194 #6 Mar 04 2018 14:40:40 %S A297194 1,1,4,1,8,17,1,12,49,80,1,16,97,280,401,1,20,161,672,1569,2084,1,24, %T A297194 241,1320,4321,8752,11073,1,28,337,2288,9681,26684,48833,59712,1,32, %U A297194 449,3640,18929,66376,160929,272976,325441,1,36,577,5440,33601,143444,435681 %N A297194 Left-hand half of triangle A297193. %e A297194 Triangle begins: %e A297194 1, %e A297194 1,4, %e A297194 1,8,17, %e A297194 1,12,49,80, %e A297194 1,16,97,280,401, %e A297194 1,20,161,672,1569,2084, %e A297194 ... %p A297194 seq(seq(A297193(n,k),k=0..n),n=0..10) ; # _R. J. Mathar_, Mar 04 2018 %Y A297194 Cf. A008288, A297193. %K A297194 nonn,easy,tabl %O A297194 0,3 %A A297194 _N. J. A. Sloane_, Jan 10 2018