a(n) = count of monomials, of degree k = n, in the complete homgeneous symmetric polynomials h(mu,k) summed over all partitions mu of n.
1, 7, 55, 631, 8001, 130453, 2323483, 48916087, 1129559068, 2944223200
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Thu May 31 17:34:19 CEST 2012 [seqfan] Symmetric Polynomials A209668 A209671 Turn up