Number of (n+2)X(6+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000001 00000011 or 00010001.

A260542

Number of (n+2)X(6+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000001 00000011 or 00010001.

Terms

    a(0) =1350a(1) =2229a(2) =5592a(3) =10949a(4) =21050a(5) =50674a(6) =105058a(7) =215160a(8) =491828a(9) =1049785a(10) =2150978a(11) =4861442a(12) =10613272a(13) =21767633a(14) =47961230a(15) =106700538a(16) =222224336a(17) =477409073a(18) =1064533728a(19) =2264380451a(20) =4801740316a(21) =10603765362a(22) =22929132008a(23) =48580458578

External references