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 A278840 #3 Nov 29 2016 07:10:03
%S A278840 1,2,19,642,58884,13569779,6931351962,7532494931779,16299546505518855,
%T A278840 67814300022651169814,520884812091898994319805,
%U A278840 7206655416715261673779120809,174009567319884878178189603283634,7196671016523025599652036668556922867
%N A278840 a(n) = permanent M_n where M_n is the n X n matrix m(i,j) = A000041(i+j).
%t A278840 Flatten[{1, Table[Permanent[Table[PartitionsP[i+j], {i, 1, n}, {j, 1, n}]], {n, 1, 14}]}]
%Y A278840 Cf. A000041, A005249, A204249, A278838, A278841.
%K A278840 nonn
%O A278840 0,2
%A A278840 _Vaclav Kotesovec_, Nov 29 2016