A259640 Number of (n+2)X(6+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000000 or 00000001

472, 1964, 11261, 42524, 182654, 899557, 3919925, 16946757, 77735408, 348525973, 1536576910, 6895676466, 30940535849, 137721843827, 615229646787, 2754036127174, 12296912173643, 54916113461292, 245512383603304

Offset

1,1

Comments

Column 6 of A259642

Links

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

Formula

Empirical: a(n) = a(n-1) +3*a(n-2) +61*a(n-3) +47*a(n-4) -60*a(n-5) -990*a(n-6) -1180*a(n-7) +352*a(n-8) +8249*a(n-9) +7603*a(n-10) -2855*a(n-11) -30388*a(n-12) -20354*a(n-13) +5185*a(n-14) +61744*a(n-15) +24167*a(n-16) -8563*a(n-17) -72780*a(n-18) -8588*a(n-19) +15051*a(n-20) +61538*a(n-21) -6778*a(n-22) -13766*a(n-23) -35716*a(n-24) +1294*a(n-25) +5880*a(n-26) +10338*a(n-27) +1680*a(n-28) -1116*a(n-30) for n>32

Example

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

Crossrefs

Cf. A259642

Sequence in context: A235287 A260102 A260135 * A187161 A249534 A180838

Adjacent sequences: A259637 A259638 A259639 * A259641 A259642 A259643

Keyword

nonn

Author

R. H. Hardin, Jul 02 2015

Status

approved