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A071307 1/2 number of n X n 0..8 matrices with MM' mod 9 = I. 0
1, 12, 648, 419904, 3061100160 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..5.

CROSSREFS

Sequence in context: A220992 A241227 A268549 * A195574 A195554 A220327

Adjacent sequences:  A071304 A071305 A071306 * A071308 A071309 A071310

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jun 11 2002

STATUS

approved

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Last modified December 6 19:22 EST 2019. Contains 329809 sequences. (Running on oeis4.)