210362

Appears in sequences

• Number of unrooted two-face maps in the plane (considered up to orientation-preserving homeomorphism) with the faces of equal degree n: planar maps with a distinguished outside face.at n=13A113183
• Number of (n+4) X 9 binary arrays with every 1 having exactly three king-move neighbors equal to 1 but with no 2 X 2 blocks of 1's.at n=6A183462
• Number of (n+4)X11 binary arrays with every 1 having exactly three king-move neighbors equal to 1 but with no 2X2 blocks of 1s.at n=4A183464
• a(n) = Sum_{i=0..n} digsum_9(i)^4, where digsum_9(i) = A053830(i).at n=52A231687