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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 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

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: A046277 A053571 A307391 * A293578 A098489 A128064

Adjacent sequences:  A129880 A129881 A129882 * A129884 A129885 A129886

KEYWORD

nonn,more

AUTHOR

N. J. A. Sloane, May 26 2007

STATUS

approved

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Last modified June 13 17:44 EDT 2021. Contains 345008 sequences. (Running on oeis4.)