49588

Appears in sequences

• Number of noncrossing trees with n edges in which no border edges emanate from the root.at n=9A102594
• Triangle read by rows: T(n,k) is the number of noncrossing trees with n edges in which the maximal number of contiguous border edges starting from the root in both directions is equal to k.at n=45A102595
• Inverse of Riordan array (1/(1-x), x/(1-x)^3), A109955.at n=38A109956
• Weight distribution of quadratic residue code of length 23 over GF(3).at n=18A112641
• Triangle, read by rows, such that the g.f. of column k = G(x)^(2k+1) where G(x) = 1 + x*G(x)^3 is the g.f. of A001764 (ternary trees).at n=48A143603
• Number of 4-step E, S, NW and NE-moving king's tours on an n X n board summed over all starting positions.at n=30A187587
• a(n) = A192525(n)/2.at n=30A192526
• Number of 2 X 2 matrices having all terms in {1,...,n} and determinant = 1 (mod 3).at n=19A211071
• Number of (w,x,y,z) with all terms in {1,...,n} and w<x>=y<=z.at n=22A212415
• Number of partitions p of n such that (number of numbers of the form 3k+1 in p) is a part of p.at n=44A241547
• Numbers n representable as x*y + x + y, where x >= y > 1, such that all x's and y's in all representation(s) of n are perfect squares.at n=42A258366
• Expansion of the series reversion of -1 + 1/(1 - x/(1 - x/(1 - x^2/(1 - x^2/(1 - x^3/(1 - x^3/(1 - ...))))))), a continued fraction.at n=10A291378
• The Fuss-Catalan triangle of order 2, read by rows. Related to ternary trees.at n=52A355172