78708

Appears in sequences

• Number of ways to place 4 nonattacking queens on a 4 X n board.at n=21A061990
• Triangle read by rows: T(n,k) is number of peakless Motzkin paths of length n and having k UHH...HD's starting above level 0, where U=(1,1), H=(1,0) and D=(1,-1) (can be easily expressed using RNA secondary structure terminology).at n=49A098073
• Absolute discriminants of complex quadratic fields with 3-class group of type (3,3) and 3-principalization type (2241).at n=31A247689
• Triangle read by rows. The coefficients of the Hahn polynomials in ascending order of powers. T(n, k) = n! * [x^k] hypergeom([-x, -n, n + 1], [1, 1], 1).at n=31A358624
• Number of partitions of n with rank 3 or higher (the rank of a partition is the largest part minus the number of parts).at n=49A363230