Number of 2Xn 0..3 arrays with every 0 next to a 1, every 1 next to a 2 and every 2 next to a 3 horizontally, diagonally or antidiagonally, and no adjacent values equal.
A232377
Number of 2Xn 0..3 arrays with every 0 next to a 1, every 1 next to a 2 and every 2 next to a 3 horizontally, diagonally or antidiagonally, and no adjacent values equal.
Terms
- a(0) =1a(1) =14a(2) =74a(3) =296a(4) =1130a(5) =4682a(6) =19448a(7) =79592a(8) =326810a(9) =1343042a(10) =5516132a(11) =22658744a(12) =93073958a(13) =382310690a(14) =1570402928a(15) =6450645104a(16) =26496901994a(17) =108839752922a(18) =447074397188
External references
- oeis: A232377