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 A306100 #37 Sep 28 2018 05:25:34 %S A306100 1,1,0,1,1,0,1,2,3,0,1,3,10,6,0,1,4,21,34,13,0,1,5,36,102,122,24,0,1, %T A306100 6,55,228,525,378,48,0,1,7,78,430,1540,2334,1242,86,0,1,8,105,726, %U A306100 3605,8964,11100,3690,160,0,1,9,136,1134,7278,25980,56292,47496,11266,282,0 %N A306100 Square array T(n,k) = number of plane partitions of n with parts colored in (at most) k colors; n >= 0, k >= 0; read by antidiagonals. %H A306100 Alois P. Heinz, <a href="/A306100/b306100.txt">Antidiagonals n = 0..50, flattened</a> %H A306100 OEIS wiki, <a href="/wiki/Plane_partitions">Plane partitions</a>. %H A306100 Wikipedia, <a href="https://en.wikipedia.org/wiki/Plane_partition">Plane partition</a>. %F A306100 T(n,k) = Sum_{j=0..n} A091298(n,j)*k^j, assuming A091298(n,0) = A000007(n). %F A306100 T(n,k) = Sum_{i=0..k} C(k,i) * A319600(n,i). - _Alois P. Heinz_, Sep 28 2018 %e A306100 The array starts: %e A306100 [1 1 1 1 1 1 ...] = A000012 %e A306100 [0 1 2 3 4 5 ...] = A001477 %e A306100 [0 3 10 21 36 55 ...] = A014105 %e A306100 [0 6 34 102 228 430 ...] = A067389 %e A306100 [0 13 122 525 1540 3605 ...] %e A306100 [0 24 378 2334 8964 25980 ...] %e A306100 [0 48 1242 11100 56292 203280 ...] %o A306100 (PARI) A306100(n,k)=sum(j=1,n,A091298(n,j)*k^j) %Y A306100 Columns k=0-5 give: A000007, A000219, A306099, A306093, A306094, A306095. %Y A306100 See A306101 for a variant. %Y A306100 Cf. A091298, A208447, A001477, A014105, A067389. %K A306100 nonn,tabl %O A306100 0,8 %A A306100 _M. F. Hasler_, Sep 22 2018 %E A306100 Edited by _Alois P. Heinz_, Sep 26 2018