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A054962 Number of different solutions to problem in A054961. 1
1, 1, 1, 1, 1, 13, 120, 1680, 4200 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,6

REFERENCES

Computed by Michael B. Greenwald (mbgreen(AT)central.cis.upenn.edu), May 24 2000.

LINKS

Table of n, a(n) for n=0..8.

CROSSREFS

Sequence in context: A295048 A295376 A188709 * A297394 A014918 A081033

Adjacent sequences:  A054959 A054960 A054961 * A054963 A054964 A054965

KEYWORD

nonn,hard,nice,more

AUTHOR

N. J. A. Sloane, May 24 2000

EXTENSIONS

a(8) from Giovanni Resta, Mar 30 2006

STATUS

approved

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Last modified January 20 02:36 EST 2018. Contains 297938 sequences.