Number of defective 4-colorings of an n X 5 0..3 array connected horizontally, vertically, diagonally and antidiagonally with exactly two mistakes, and colors introduced in row-major 0..3 order.

A229752

Number of defective 4-colorings of an n X 5 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) =12a(1) =1840a(2) =6809a(3) =15075a(4) =29776a(5) =57677a(6) =113330a(7) =228657a(8) =473562a(9) =1000381a(10) =2139866a(11) =4607729a(12) =9947906a(13) =21481485a(14) =46333458a(15) =99752209a(16) =214296842a(17) =459341309a(18) =982407146a(19) =2096608977a(20) =4465367730a(21) =9492005773a(22) =20140323170a(23) =42660619313

External references