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 A278842 #3 Nov 29 2016 07:11:54
%S A278842 1,2,55,27748,344594008,136380529541352,2157772538315935462248,
%T A278842 1668027050325234150218003699928,
%U A278842 75373026050211759045605399079260651909904,234016759373014155226647943608719679545651260629498624
%N A278842 a(n) = permanent M_n where M_n is the n X n matrix m(i,j) = Bell(i+j).
%t A278842 Flatten[{1, Table[Permanent[Table[BellB[i+j], {i, 1, n}, {j, 1, n}]], {n, 1, 12}]}]
%Y A278842 Cf. A000110, A203227.
%K A278842 nonn
%O A278842 0,2
%A A278842 _Vaclav Kotesovec_, Nov 29 2016