20934997854
domain: N
Appears in sequences
- 1/2 the number of colorings of a 7 X 7 square array with n colors.at n=1A068243
- Half the number of (n+1)X(n+1) 0..2 arrays with every 2X2 subblock having two or four distinct clockwise edge differences.at n=5A209504
- Half the number of (n+1)X7 0..2 arrays with every 2X2 subblock having two or four distinct clockwise edge differences.at n=5A209509