Number of defective 4-colorings of an n X 3 0..3 array connected horizontally, vertically, diagonally and antidiagonally with exactly two mistakes, and colors introduced in row-major 0..3 order.
A229750
Number of defective 4-colorings of an n X 3 0..3 array connected horizontally, vertically, diagonally and antidiagonally with exactly two mistakes, and colors introduced in row-major 0..3 order.
Terms
- a(0) =1a(1) =60a(2) =598a(3) =2347a(4) =6809a(5) =17404a(6) =41872a(7) =97565a(8) =223075a(9) =503650a(10) =1126490a(11) =2500555a(12) =5515189a(13) =12096536a(14) =26401012a(15) =57368137a(16) =124167191a(17) =267790942a(18) =575680798a(19) =1233926231a(20) =2637709321a(21) =5624580148a(22) =11966370008a(23) =25404922357a(24) =53829723019
External references
- oeis: A229750