A226321 Number of real {0,1} matrices n X n which are the square of a {0,1} matrix.

1, 2, 8, 88, 3245, 254411, 37324414

Offset: 0

Author

Giovanni Resta, Jun 03 2013

Keywords

• nonn
• more
• hard

Comments

A121231(n) >= a(n).

Examples

			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
		

Links

• Index entries for matrices, binary, which are squares

Crossrefs

Cf. A121231, A225371.