Number of n X 2 0..1 arrays with no element equal to more than one of its horizontal and antidiagonal neighbors, with the exception of exactly one element, and with new values introduced in order 0 sequentially upwards.

A281199

Number of n X 2 0..1 arrays with no element equal to more than one of its horizontal 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) =2a(2) =10a(3) =38a(4) =130a(5) =420a(6) =1308a(7) =3970a(8) =11822a(9) =34690a(10) =100610a(11) =289032a(12) =823800a(13) =2332418a(14) =6566290a(15) =18394910a(16) =51310978a(17) =142587180a(18) =394905492a(19) =1090444930a(20) =3002921270a(21) =8249479162a(22) =22612505090a(23) =61857842448a(24) =168903452400a(25) =460409998850

External references