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, diagonally or antidiagonally, with no adjacent elements equal.
A232517
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, diagonally or antidiagonally, with no adjacent elements equal.
Terms
- a(0) =4a(1) =52a(2) =32a(3) =326a(4) =250a(5) =2138a(6) =1956a(7) =13976a(8) =14782a(9) =91760a(10) =109522a(11) =604450a(12) =799026a(13) =3994420a(14) =5761416a(15) =26475334a(16) =41161880a(17) =175967762a(18) =291918330a(19) =1172568978a(20) =2057927044a(21) =7831923864a(22) =14436579566a(23) =52424836208a(24) =100861979186a(25) =351610320834
External references
- oeis: A232517