A290214 - OEIS

%I #8 Jan 04 2023 21:08:24

%S 1,1,28,3740,1161678,741215012,840790914296,1439884504332480,

%T 3576753835657635164,12524266750764601753576,

%U 59517682037036901339560926,363169855509323114958694015304,2774932810808589820997792848479674,26216044235174202943266623056680424524

%N Number of solid standard Young tableaux of cylindrical shape lambda X 4, where lambda ranges over all partitions of n.

%H S. B. Ekhad and D. Zeilberger, <a href="https://arxiv.org/abs/1202.6229">Computational and Theoretical Challenges on Counting Solid Standard Young Tableaux</a>, arXiv:1202.6229 [math.CO], 2012.

%H Wikipedia, <a href="https://en.wikipedia.org/wiki/Young_tableau">Young tableau</a>

%p b:= proc(l) option remember; local m; m:= nops(l);

%p       `if`({map(x-> x[], l)[]}minus{0}={}, 1, add(add(`if`(l[i][j]>

%p       `if`(i=m or nops(l[i+1])<j, 0, l[i+1][j]) and l[i][j]>

%p       `if`(nops(l[i])=j, 0, l[i][j+1]), b(subsop(i=subsop(

%p        j=l[i][j]-1, l[i]), l)), 0), j=1..nops(l[i])), i=1..m))

%p     end:

%p g:= proc(n, i, l) `if`(n=0 or i=1, b(map(x->[4$x], [l[], 1$n])),

%p        add(g(n-i*j, i-1, [l[], i$j]), j=0..n/i))

%p     end:

%p a:= n-> g(n$2, []):

%p seq(a(n), n=0..8);

%t b[l_] := b[l] = With[{m = Length[l]}, If[Union[l // Flatten] ~Complement~ {0} == {}, 1, Sum[Sum[If[l[[i, j]] > If[i == m || Length[l[[i + 1]]] < j, 0, l[[i + 1, j]]] && l[[i, j]] > If[Length[l[[i]]] == j, 0, l[[i, j + 1]]], b[ReplacePart[l, i -> ReplacePart[l[[i]], j -> l[[i, j]] - 1]]], 0], {j, 1, Length[l[[i]]]}], {i, 1, m}]]];

%t g[n_, i_, k_, l_] := If[n == 0 || i == 1, b[Table[k, {#}] & /@ Join[l, Table[1, {n}]]], Sum[g[n - i*j, i - 1, k, Join[l, Table[i, {j}]]], {j, 0, n/i}]];

%t a[n_] := g[n, n, 4, {}];

%t Table[a[n], {n, 0, 10}] (* _Jean-François Alcover_, Dec 28 2022, after _Alois P. Heinz_ in A215204 *)

%Y Column k=4 of A215204.

%K nonn

%O 0,3

%A _Alois P. Heinz_, Jul 24 2017