351568

Appears in sequences

• Number of 4-ary search trees on n keys.at n=16A019498
• a(n) = 4*n*(4*n^2 + 3).at n=28A271636
• Number of n X n 0..1 arrays with no element equal to more than one of its horizontal and vertical neighbors, with the exception of exactly one element, and with new values introduced in order 0 sequentially upwards.at n=15A280434