Number of (n+2)X(5+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000001 00000011 or 00001111.

A260367

Number of (n+2)X(5+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000001 00000011 or 00001111.

Terms

    a(0) =616a(1) =896a(2) =2532a(3) =5326a(4) =6144a(5) =15440a(6) =37948a(7) =52390a(8) =101664a(9) =257566a(10) =426880a(11) =725994a(12) =1725912a(13) =3274678a(14) =5445516a(15) =11736246a(16) =23960256a(17) =41364302a(18) =81988816a(19) =171038604a(20) =310817940a(21) =587494972a(22) =1211225620a(23) =2298124782a(24) =4275996700a(25) =8598088978

External references