Number of 3 X n 0..1 arrays with no element equal to more than two of its horizontal, diagonal or antidiagonal neighbors, with the exception of exactly one element, and with new values introduced in order 0 sequentially upwards.

A281402

Number of 3 X n 0..1 arrays with no element equal to more than two of its horizontal, diagonal or antidiagonal neighbors, with the exception of exactly one element, and with new values introduced in order 0 sequentially upwards.

Terms

    a(0) =0a(1) =6a(2) =131a(3) =314a(4) =689a(5) =1294a(6) =2364a(7) =4338a(8) =7850a(9) =14150a(10) =25510a(11) =45790a(12) =81958a(13) =146454a(14) =261006a(15) =464062a(16) =823590a(17) =1458790a(18) =2579102a(19) =4552526a(20) =8023638a(21) =14120758a(22) =24818318a(23) =43566366a(24) =76387782a(25) =133790726a(26) =234092798a(27) =409199086a(28) =714645558a(29) =1247036630

External references