A213454 a(n) = A001253(n)/2.

0, 0, 0, 0, 1, 10, 99, 1024, 11234, 132269, 1670481, 22586759, 326104782, 5012334813, 81773199730, 1411970823695, 25734352973795, 493835621908325, 9954533195180673, 210325338388169070, 4648654469101584811, 107281499755284506084

Offset: 1

Author

N. J. A. Sloane, Jun 12 2012

Keywords

• nonn

References

• 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).
• N. J. A. Sloane, A Handbook of Integer Sequences, Academic Press, 1973 (includes this sequence).

Crossrefs

Cf. A001253.