A213452 A001251(n)/2. (Formerly N1761)

0, 0, 1, 6, 35, 221, 1554, 12108, 104293, 986452, 10186669, 114173261, 1381606490, 17963133122, 249838334627, 3702507093782, 58255992451047, 970036965428901, 17043762930794782, 315148172259643152, 6117607922562556061, 124394868793682972996

Offset

1,4

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).

Links

Table of n, a(n) for n=1..22.

Crossrefs

Cf. A001251.

Sequence in context: A370323 A317409 A354324 * A357834 A000399 A081051

Adjacent sequences: A213449 A213450 A213451 * A213453 A213454 A213455

Keyword

nonn

Author

N. J. A. Sloane, Jun 12 2012

Status

approved