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 A339577 #7 Dec 19 2020 07:56:52 %S A339577 1,2,3,4,10,12,21,24,72,80,110,180,234,504,840,896,1088,2160,2565, %T A339577 5400,7560,10560,12144,14784,25200,32760,84240,87360,97440,181440, %U A339577 200880,207360,380160,456960,1249500,1413720,1538460,1805760,2845440,3502080,3778560,7076160,7606872,15567552 %N A339577 a(n) = product of nonzero entries in row n of A235791. %p A339577 a:= n-> mul(ceil((n+1)/k-(k+1)/2), k=1..floor((sqrt(8*n+1)-1)/2)): %p A339577 seq(a(n), n=1..60); %Y A339577 Cf. A235791, A060831, A024916, A237593. %K A339577 nonn %O A339577 1,2 %A A339577 _N. J. A. Sloane_, Dec 19 2020