A262474 Number of (4+1)X(n+1) 0..1 arrays with each row divisible by 3 and each column divisible by 5, read as a binary number with top and left being the most significant bits.

7, 17, 115, 457, 3055, 16081, 107731, 655001, 4427407, 28848817, 196901395, 1326556777, 9126593455, 62528586641, 432702173011, 2991144099001, 20781922758607, 144379920476017, 1005798678435475, 7008103279484297

Offset

1,1

Comments

Row 4 of A262472.

Links

R. H. Hardin, Table of n, a(n) for n = 1..210

Formula

Empirical: a(n) = 7*a(n-1) +75*a(n-2) -525*a(n-3) -2034*a(n-4) +14238*a(n-5) +25010*a(n-6) -175070*a(n-7) -141969*a(n-8) +993783*a(n-9) +333315*a(n-10) -2333205*a(n-11) -214396*a(n-12) +1500772*a(n-13)

Example

Some solutions for n=4
..0..1..0..0..1....0..0..0..0..0....1..1..0..0..0....0..1..1..0..0
..1..1..1..1..0....0..0..0..0..0....1..0..1..0..1....0..1..1..1..1
..0..1..1..1..1....0..0..0..1..1....1..1..0..0..0....0..1..1..1..1
..1..1..1..1..0....0..0..0..0..0....1..0..1..0..1....0..1..1..1..1
..0..0..1..1..0....0..0..0..1..1....0..0..0..0..0....0..0..0..1..1

Crossrefs

Cf. A262472.

Sequence in context: A068172 A067185 A205989 * A284416 A063384 A165246

Adjacent sequences: A262471 A262472 A262473 * A262475 A262476 A262477

Keyword

nonn

Author

R. H. Hardin, Sep 23 2015

Status

approved