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 A061697 #11 Jul 12 2020 19:34:31
%S A061697 1,0,0,1,1,1,201,1226,5587,493333,8910253,109739620,6832444928,
%T A061697 251336859489,6402632091649,369288128260091,21333939590516867,
%U A061697 941843896620169405,60266201588496408645,4623833509894543300868,309412778502377193367456,24102475277979402591991181
%N A061697 Generalized Bell numbers.
%H A061697 J.-M. Sixdeniers, K. A. Penson and A. I. Solomon, <a href="http://www.cs.uwaterloo.ca/journals/JIS/VOL4/SIXDENIERS/bell.html">Extended Bell and Stirling Numbers From Hypergeometric Exponentiation</a>, J. Integer Seqs. Vol. 4 (2001), #01.1.4.
%F A061697 Sum_{n>=0} a(n) * x^n / (n!)^2 = exp(BesselI(0,2*sqrt(x)) - 1 - x - x^2/4). - _Ilya Gutkovskiy_, Jul 12 2020
%Y A061697 Cf. A023998, A061696.
%K A061697 nonn
%O A061697 0,7
%A A061697 _N. J. A. Sloane_, Jun 19 2001
%E A061697 More terms from _Ilya Gutkovskiy_, Jul 12 2020