A229684 Number of defective 3-colorings of an n X 7 0..2 array connected diagonally and antidiagonally with exactly two mistakes, and colors introduced in row-major 0..2 order.
0, 101376, 7952256, 437924880, 21063718224, 937213830720, 39647663129952, 1617006498774912, 64143524707305984, 2489243835565159488, 94897266574306915296, 3564781098414437505600, 132254323024723203273120
Offset: 1
Keywords
Examples
Some solutions for n=3: 0 0 1 1 1 0 1 0 0 1 0 1 0 1 0 1 1 2 1 2 1 1 0 2 0 2 0 1 2 0 1 0 1 0 1 2 0 0 0 0 0 0 0 0 1 0 2 0 1 2 2 2 0 1 2 2 2 1 1 1 2 1 0
Links
- R. H. Hardin, Table of n, a(n) for n = 1..172
- R. H. Hardin, Empirical recurrence of order 46
Formula
Empirical recurrence of order 46 (see link above).
Comments