Number of (n+2) X (1+2) 0..1 arrays with each 3 X 3 subblock having clockwise perimeter pattern 00000001 00000101 or 00001001.
A260241
Number of (n+2) X (1+2) 0..1 arrays with each 3 X 3 subblock having clockwise perimeter pattern 00000001 00000101 or 00001001.
Terms
- a(0) =48a(1) =99a(2) =256a(3) =635a(4) =1598a(5) =4027a(6) =10110a(7) =25421a(8) =63884a(9) =160475a(10) =403392a(11) =1013853a(12) =2547460a(13) =6402009a(14) =16089526a(15) =40433015a(16) =101609368a(17) =255352867a(18) =641716970a(19) =1612668111a(20) =4052732014a(21) =10184756245a(22) =25594885072a(23) =64321450263a(24) =161643568800
External references
- oeis: A260241