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A258586
Number of solid standard Young tableaux of shape [[{n}^(n+1)],[n]^n].
2
1, 2, 936, 1825221320, 70351928759681296000, 160978956785364112335731878007698260, 51488321677815455036453939239317069333712945710369620220, 4648889159675386017282064494039528050991187044317172798976485350954735075040045120
OFFSET
0,2
LINKS
MAPLE
b:= proc(l) option remember; local m; m:= nops(l);
`if`({map(x-> x[], l)[]}={0}, 1, add(add(`if`(l[i][j]>
`if`(i=m or nops(l[i+1])<j, 0, l[i+1][j]) and l[i][j]>
`if`(nops(l[i])=j, 0, l[i][j+1]), b(subsop(i=subsop(
j=l[i][j]-1, l[i]), l)), 0), j=1..nops(l[i])), i=1..m))
end:
a:= n-> b([[n$(n+1)], [n]$n]):
seq(a(n), n=0..5);
CROSSREFS
Sequence in context: A070927 A070922 A332192 * A176940 A337309 A172386
KEYWORD
nonn
AUTHOR
Alois P. Heinz, Nov 06 2015
STATUS
approved