A129885 Sequence a_{t_n} arising in enumeration of arrays of directed blocks (see Quaintance reference for precise definition), where a_n = A129878, t_n = A129875.

0, 1, 3, 3, 10, 13, 47, 59

Offset

1,3

References

Jocelyn Quaintance, Combinatoric Enumeration of Two-Dimensional Proper Arrays, Discrete Math., 307 (2007), 1844-1864.

Links

Table of n, a(n) for n=1..8.

Formula

See Quaintance reference for generating functions that produce A129872-A129886.

Crossrefs

Sequence in context: A081809 A359894 A236170 * A277963 A193965 A301279

Adjacent sequences: A129882 A129883 A129884 * A129886 A129887 A129888

Keyword

nonn,more

Author

N. J. A. Sloane, May 26 2007

Status

approved