Number of defective 4-colorings of an n X 2 0..3 array connected horizontally, antidiagonally and vertically with exactly two mistakes, and colors introduced in row-major 0..3 order.
A229666
Number of defective 4-colorings of an n X 2 0..3 array connected horizontally, antidiagonally and vertically with exactly two mistakes, and colors introduced in row-major 0..3 order.
Terms
- a(0) =0a(1) =4a(2) =61a(3) =652a(4) =5048a(5) =33152a(6) =197248a(7) =1098752a(8) =5838848a(9) =29949952a(10) =149454848a(11) =729546752a(12) =3497525248a(13) =16517169152a(14) =77015810048a(15) =355207217152
External references
- oeis: A229666