423800

Appears in sequences

• Number of length 1+3 0..n arrays with no disjoint pairs in any consecutive four terms having the same sum.at n=24A247727
• Numbers k such that k and k+1 are both half-Zumkeller numbers (A246198).at n=31A331371
• Place n points in general position on each side of a square, and join every pair of the 4*n+4 boundary points by a chord; sequence gives number of edges in the resulting planar graph.at n=12A367122