54766domain: NAppears in sequencesCardinality of the Weyl alternation set corresponding to the zero-weight in the adjoint representation of the Lie algebra so(2n+1).at n=15A232163a(n) = Sum_{k=1..n} floor(n/(2*k-1))^k.at n=50A350147G.f.: Product_{k >= 0} ((1 + x^(2*k+1)) / (1 - x^(2*k+1)))^k.at n=36A361008