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A226321 Number of real {0,1} matrices n X n which are the square of a {0,1} matrix. 2
1, 2, 8, 88, 3245, 254411, 37324414 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,2
COMMENTS
A121231(n) >= a(n).
LINKS
EXAMPLE
The 8 solutions when n=2 are:
00 00 00 01 10 10 10 11
00 01 11 01 00 01 10 00
- from N. J. A. Sloane, Jun 03 2013
CROSSREFS
Sequence in context: A009144 A132316 A136749 * A054955 A012299 A012295
KEYWORD
nonn,more,hard
AUTHOR
Giovanni Resta, Jun 03 2013
STATUS
approved

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Last modified March 28 20:05 EDT 2024. Contains 371254 sequences. (Running on oeis4.)