A224595 Number of (n+7)X13 0..1 matrices with each 8X8 subblock idempotent

877647, 110868, 105212, 114337, 122713, 128682, 132787, 135622, 137700, 157201, 193783, 243309, 301667, 365687, 433384, 503411, 574992, 665573, 792178, 967802, 1201330, 1498385, 1862641, 2296415, 2801260, 3396151, 4117085, 5013150, 6142255

Offset

1,1

Comments

Column 6 of A224597

Links

R. H. Hardin, Table of n, a(n) for n = 1..52

Formula

Empirical: a(n) = 3*a(n-1) -4*a(n-2) +5*a(n-3) -7*a(n-4) +8*a(n-5) -8*a(n-6) +8*a(n-7) -6*a(n-8) +3*a(n-9) -2*a(n-10) +3*a(n-12) -4*a(n-13) +4*a(n-14) -4*a(n-15) +3*a(n-16) -2*a(n-17) +2*a(n-18) -a(n-19) for n>25

Example

Some solutions for n=3
..1..0..0..0..0..0..0..0..0..0..0..0..1
..1..0..0..0..0..0..0..0..0..0..0..0..0
..1..0..0..0..0..0..0..0..0..0..0..0..0
..1..0..0..0..0..0..0..0..0..0..0..0..1
..0..0..0..0..0..0..0..0..0..0..0..0..0
..1..0..0..0..0..0..0..0..0..0..0..0..0
..0..0..0..0..0..0..0..0..0..0..0..0..1
..1..0..0..0..0..0..0..0..0..0..0..0..1
..0..0..0..0..0..0..0..0..0..0..0..0..1
..1..0..0..0..0..0..0..0..0..0..0..0..1

Crossrefs

Sequence in context: A254421 A254428 A271264 * A254387 A254394 A253982

Adjacent sequences: A224592 A224593 A224594 * A224596 A224597 A224598

Keyword

nonn

Author

R. H. Hardin Apr 11 2013

Status

approved