Number of n X 3 0..4 arrays with each element equal to the number its horizontal and vertical neighbors within one of itself.

A196012

Number of n X 3 0..4 arrays with each element equal to the number its horizontal and vertical neighbors within one of itself.

Terms

    a(0) =1a(1) =1a(2) =2a(3) =7a(4) =13a(5) =16a(6) =32a(7) =65a(8) =125a(9) =211a(10) =390a(11) =732a(12) =1368a(13) =2478a(14) =4555a(15) =8417a(16) =15564a(17) =28583a(18) =52598a(19) =96921a(20) =178684a(21) =328956a(22) =605723a(23) =1115678a(24) =2055336a(25) =3785356a(26) =6971537a(27) =12840292a(28) =23650713a(29) =43560381

External references