Number of (n+2) X (5+2) 0..1 arrays with each 3 X 3 subblock having clockwise perimeter pattern 00010101 or 01010101.
A259739
Number of (n+2) X (5+2) 0..1 arrays with each 3 X 3 subblock having clockwise perimeter pattern 00010101 or 01010101.
Terms
- a(0) =101a(1) =230a(2) =792a(3) =1882a(4) =4904a(5) =12086a(6) =35036a(7) =82492a(8) =230779a(9) =558772a(10) =1577501a(11) =3768294a(12) =10628286a(13) =25527500a(14) =71944515a(15) =172476846a(16) =486443504a(17) =1166766006a(18) =3289324908a(19) =7889105734a(20) =22245018682a(21) =53350796392a(22) =150422906869a(23) =360775136244
External references
- oeis: A259739