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 A059724 #6 Oct 04 2022 16:40:26 %S A059724 1,6,29,148,818,4964,32989,238931,1875750,15877954,144229155, %T A059724 1399818783,14459867443,158421403734,1835075534606,22410381524083, %U A059724 287792334374327,3877249814539076,54682843244983801,805762421350331195,12382437603795254667,198118073801089459039 %N A059724 Second diagonal of A059720. %C A059724 I would very much like to find a formula for this. - _N. J. A. Sloane_ %K A059724 nonn %O A059724 2,2 %A A059724 _N. J. A. Sloane_, Feb 09 2001 %E A059724 More terms from _Sean A. Irvine_, Oct 04 2022