Number of (2+1) X (n+1) 0..2 arrays with every element next to itself plus and minus one within the range 0..2 horizontally or antidiagonally, with no adjacent elements equal.
A232591
Number of (2+1) X (n+1) 0..2 arrays with every element next to itself plus and minus one within the range 0..2 horizontally or antidiagonally, with no adjacent elements equal.
Terms
- a(0) =2a(1) =34a(2) =12a(3) =152a(4) =108a(5) =690a(6) =744a(7) =3232a(8) =4516a(9) =15592a(10) =25724a(11) =76914a(12) =141516a(13) =385622a(14) =762648a(15) =1955944a(16) =4058152a(17) =10001440a(18) =21421592a(19) =51425362a(20) =112496648a(21) =265415854a(22) =588810972a(23) =1373336224a(24) =3075128652a(25) =7118096080a(26) =16037159652a(27) =36935382354
External references
- oeis: A232591