60770

Appears in sequences

• Number of n X 3 0..2 arrays with horizontal differences mod 3 never 1, vertical differences mod 3 never -1, rows lexicographically nondecreasing, and columns lexicographically nonincreasing.at n=13A229423
• Number of distinct characteristic polynomials for 2 X 2 matrices with entries from {0, 1, ..., n}.at n=33A366448