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A333508
Central coefficients of polynomials related to Weyl groups and defined in A162206.
1
1, 2, 6, 30, 212, 1924, 21280, 277788, 4180544, 71259048, 1356909620, 28547946524, 657640647850, 16463431995932, 445040788849348, 12919664598624526, 400880326987609778, 13239976828676088316, 463742797180250495450, 17169969365226035615744
OFFSET
1,2
MATHEMATICA
a[n_] := SeriesCoefficient[(1-x^n) Product[1-x^(2k), {k, 1, n-1}]/(1-x)^n, {x, 0, n(n-1)/2}];
Array[a, 20]
KEYWORD
nonn
AUTHOR
STATUS
approved