%I N2026 #9 Mar 22 2024 18:41:37
%S 0,0,0,0,1,10,99,1024,11234,132269,1670481,22586759,326104782,
%T 5012334813,81773199730,1411970823695,25734352973795,493835621908325,
%U 9954533195180673,210325338388169070,4648654469101584811,107281499755284506084
%N a(n) = A001253(n)/2.
%D F. N. David, M. G. Kendall and D. E. Barton, Symmetric Function and Allied Tables, Cambridge, 1966, p. 262. (Terms for n>=13 are incorrect).
%D N. J. A. Sloane, A Handbook of Integer Sequences, Academic Press, 1973 (includes this sequence).
%Y Cf. A001253.
%K nonn
%O 1,6
%A _N. J. A. Sloane_, Jun 12 2012