Number of (n+2)X(7+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00001011 00010101 or 01010101.
A261379
Number of (n+2)X(7+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00001011 00010101 or 01010101.
Terms
- a(0) =392a(1) =864a(2) =3778a(3) =12500a(4) =39494a(5) =128998a(6) =461576a(7) =1468008a(8) =5004588a(9) =16267396a(10) =56289594a(11) =180787146a(12) =623643757a(13) =2013680076a(14) =6945409809a(15) =22381289794a(16) =77243050853a(17) =249062829770a(18) =859199611263
External references
- oeis: A261379