Number of 2 X n 0..1 arrays with no element unequal to a strict majority of its horizontal, diagonal and antidiagonal neighbors, with the exception of exactly one element, and with new values introduced in order 0 sequentially upwards.

A281766

Number of 2 X n 0..1 arrays with no element unequal to a strict majority of its horizontal, diagonal and antidiagonal neighbors, with the exception of exactly one element, and with new values introduced in order 0 sequentially upwards.

Terms

    a(0) =0a(1) =4a(2) =14a(3) =40a(4) =110a(5) =280a(6) =698a(7) =1696a(8) =4052a(9) =9564a(10) =22330a(11) =51728a(12) =118998a(13) =272228a(14) =619804a(15) =1405456a(16) =3175966a(17) =7155320a(18) =16078698a(19) =36048008a(20) =80656900a(21) =180149700a(22) =401740002a(23) =894646944a(24) =1989842814a(25) =4420825196a(26) =9811946668a(27) =21757950712a(28) =48209235558

External references