Number of (n+2)X(3+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000001 00000101 or 00010101.
A260101
Number of (n+2)X(3+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000001 00000101 or 00010101.
Terms
- a(0) =206a(1) =477a(2) =1136a(3) =2768a(4) =6878a(5) =17125a(6) =42372a(7) =104772a(8) =258690a(9) =639184a(10) =1578958a(11) =3902316a(12) =9640990a(13) =23821537a(14) =58852874a(15) =145410924a(16) =359251828a(17) =887606592a(18) =2192956508a(19) =5418102592a(20) =13386231028a(21) =33072997411a(22) =81712020092a(23) =201883197204
External references
- oeis: A260101