login
A210429
Number of semistandard Young tableaux over all partitions of 7 with maximal element <= n.
2
0, 1, 20, 189, 1100, 4615, 15372, 43219, 106808, 238581, 491380, 946913, 1726308, 3002987, 5018092, 8098695, 12679024, 19324937, 28761876, 41906533, 59902460, 84159855, 116399756, 158702875, 213563304, 283947325, 373357556, 485902665, 626372884, 800321555
OFFSET
0,3
LINKS
FORMULA
a(n) = n*(180+(637+(385+58*n^2)*n^2)*n^2)/1260.
G.f.: x*(x+1)^2*(x^4+10*x^3+36*x^2+10*x+1)/(x-1)^8.
MAPLE
a:= n-> n*(180+(637+(385+58*n^2)*n^2)*n^2)/1260:
seq(a(n), n=0..40);
MATHEMATICA
CoefficientList[Series[x (x+1)^2(x^4+10x^3+36x^2+10x+1)/(x-1)^8, {x, 0, 40}], x] (* or *) LinearRecurrence[{8, -28, 56, -70, 56, -28, 8, -1}, {0, 1, 20, 189, 1100, 4615, 15372, 43219}, 40] (* Harvey P. Dale, Jan 29 2023 *)
CROSSREFS
Row n=7 of A210391.
Sequence in context: A219581 A177073 A211153 * A367780 A047645 A010936
KEYWORD
nonn,easy
AUTHOR
Alois P. Heinz, Mar 21 2012
STATUS
approved