Number of (n+2)X(3+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00001011 00010101 or 01010101.
A261375
Number of (n+2)X(3+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00001011 00010101 or 01010101.
Terms
- a(0) =60a(1) =82a(2) =202a(3) =424a(4) =869a(5) =1714a(6) =3778a(7) =7462a(8) =15888a(9) =31618a(10) =68245a(11) =135058a(12) =290195a(13) =575938a(14) =1238957a(15) =2455954a(16) =5282429a(17) =10475722a(18) =22530337a(19) =44674906a(20) =96090169a(21) =190539730a(22) =409810129a(23) =812624530a(24) =1747814377a(25) =3465775738a(26) =7454228289a(27) =14781184618
External references
- oeis: A261375