Number of defective 3-colorings of an n X 2 0..2 array connected horizontally and vertically with exactly two mistakes, and colors introduced in row-major 0..2 order.
A229600
Number of defective 3-colorings of an n X 2 0..2 array connected horizontally and vertically with exactly two mistakes, and colors introduced in row-major 0..2 order.
Terms
- a(0) =0a(1) =6a(2) =39a(3) =202a(4) =925a(5) =3924a(6) =15795a(7) =61182a(8) =230121a(9) =845640a(10) =3049407a(11) =10825650a(12) =37929141a(13) =131403708a(14) =450839115a(15) =1533738726a(16) =5178892545a(17) =17371743408a(18) =57926537559a(19) =192131864730a(20) =634207340493
External references
- oeis: A229600