Number of (n+2)X(5+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000001 00000101 or 00001001.
A260245
Number of (n+2)X(5+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000001 00000101 or 00001001.
Terms
- a(0) =1598a(1) =3026a(2) =8242a(3) =14045a(4) =38280a(5) =122048a(6) =238852a(7) =523742a(8) =1565104a(9) =3971668a(10) =8022956a(11) =20813200a(12) =57401848a(13) =128904402a(14) =294881048a(15) =796376738a(16) =1970767384a(17) =4434114134a(18) =11116178928a(19) =28746082714a(20) =67430459184a(21) =160189504544a(22) =409946518912
External references
- oeis: A260245