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A129884
Sequence a_{s_n} arising in enumeration of arrays of directed blocks (see Quaintance reference for precise definition), where a_n = A129878, s_n = A129873.
0
1, 1, 4, 4, 16, 17, 72, 79
OFFSET
1,3
REFERENCES
Jocelyn Quaintance, Combinatoric Enumeration of Two-Dimensional Proper Arrays, Discrete Math., 307 (2007), 1844-1864.
FORMULA
See Quaintance reference for generating functions that produce A129872-A129886.
CROSSREFS
Sequence in context: A222956 A170833 A231940 * A137725 A240035 A321677
KEYWORD
nonn,more
AUTHOR
N. J. A. Sloane, May 26 2007
STATUS
approved