Number of nX2 0..1 arrays with no element equal to more than two of its horizontal, vertical and antidiagonal neighbors and with new values introduced in order 0 sequentially upwards.
A280598
Number of nX2 0..1 arrays with no element equal to more than two of its horizontal, vertical and antidiagonal neighbors and with new values introduced in order 0 sequentially upwards.
Terms
- a(0) =2a(1) =7a(2) =18a(3) =50a(4) =138a(5) =383a(6) =1063a(7) =2951a(8) =8193a(9) =22748a(10) =63161a(11) =175370a(12) =486925a(13) =1351977a(14) =3753848a(15) =10422792a(16) =28939529a(17) =80352400a(18) =223103432a(19) =619460544a(20) =1719970697a(21) =4775605529a(22) =13259765537a(23) =36816563059a(24) =102223475346a(25) =283829832107
External references
- oeis: A280598