Number of (n+2)X(6+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000101 00010101 or 01010101.

A260013

Number of (n+2)X(6+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000101 00010101 or 01010101.

Terms

    a(0) =828a(1) =2738a(2) =18356a(3) =84050a(4) =294336a(5) =1210568a(6) =5674360a(7) =24724512a(8) =101249348a(9) =428893472a(10) =1872332800a(11) =8043685448a(12) =34055537824a(13) =145297154312a(14) =624337715924

External references