Number of n X 3 0..2 arrays with no element equal to any value at offset (-1,-2) (-2,-1) or (-1,0) and new values introduced in order 0..2.
A274723
Number of n X 3 0..2 arrays with no element equal to any value at offset (-1,-2) (-2,-1) or (-1,0) and new values introduced in order 0..2.
Terms
- a(0) =5a(1) =24a(2) =68a(3) =260a(4) =1040a(5) =4132a(6) =16524a(7) =66088a(8) =264332a(9) =1057316a(10) =4229264a(11) =16917028a(12) =67668108a(13) =270672424a(14) =1082689676a(15) =4330758692a(16) =17323034768a(17) =69292139044a(18) =277168556172
External references
- oeis: A274723