Number of 2 X n 0..1 arrays avoiding 0 0 0 and 1 0 1 horizontally and 0 0 1 and 1 0 1 vertically.

A207170

Number of 2 X n 0..1 arrays avoiding 0 0 0 and 1 0 1 horizontally and 0 0 1 and 1 0 1 vertically.

Terms

    a(0) =4a(1) =16a(2) =36a(3) =81a(4) =169a(5) =361a(6) =784a(7) =1681a(8) =3600a(9) =7744a(10) =16641a(11) =35721a(12) =76729a(13) =164836a(14) =354025a(15) =760384a(16) =1633284a(17) =3508129a(18) =7535025a(19) =16184529a(20) =34762816a(21) =74666881a(22) =160376896a(23) =344473600a(24) =739894401a(25) =1589218225a(26) =3413480625a(27) =7331811876a(28) =15747991081

External references