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A129883
Sequence i_{h_n} arising in enumeration of arrays of directed blocks (see Quaintance reference for precise definition), where i_n = A129876, h_n = A129874.
0
2, 0, 2, 2, 10, 6, 34, 88
OFFSET
1,1
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: A046277 A053571 A307391 * A376965 A293578 A098489
KEYWORD
nonn,more
AUTHOR
N. J. A. Sloane, May 26 2007
STATUS
approved