52826

Appears in sequences

• Number of -n..n arrays x(0..3) of 4 elements with zero sum, adjacent elements differing by more than one, and elements alternately increasing and decreasing.at n=28A200193
• Number of (n+4)X(n+4) 0..1 matrices with each 5X5 subblock idempotent.at n=13A224682
• Number of isomorphism classes of connected 3-regular multigraphs with n vertices and with loops and semi-edges allowed.at n=10A243394