Number of n X 2 0..2 arrays x(i,j) with each element horizontally, vertically or antidiagonally next to at least one element with value (x(i,j)+1) mod 3, and upper left element zero.
A230331
Number of n X 2 0..2 arrays x(i,j) with each element horizontally, vertically or antidiagonally next to at least one element with value (x(i,j)+1) mod 3, and upper left element zero.
Terms
- a(0) =0a(1) =6a(2) =34a(3) =218a(4) =1386a(5) =8810a(6) =56010a(7) =356074a(8) =2263690a(9) =14391082a(10) =91489226a(11) =581629546a(12) =3697625866a(13) =23507122602a(14) =149443138122a(15) =950063174890
External references
- oeis: A230331