19885

Appears in sequences

• Small-number statistic from the enumeration of domino tilings of a 9-pillow of order n.at n=15A112844
• Triangle read by rows: T(n,k) is the number of weighted lattice paths in B(n) having k valleys. The members of B(n) are paths of weight n that start at (0,0), end on but never go below the horizontal axis, and whose steps are of the following four kinds: an (1,0)-step with weight 1, an (1,0)-step with weight 2, a (1,1)-step with weight 2, and a (1,-1)-step with weight 1. The weight of a path is the sum of the weights of its steps. A valley is a (1,-1)-step followed by a (1,1)-step.at n=45A182900
• Number of 2 X 2 matrices having all terms in {-n,...,0,...,n} and 0 <= determinant <= n.at n=10A211146
• Composite numbers coprime to 6 such that A179382(n) = A000265(n-1), the odd part of n-1.at n=31A225913
• Ceiling(Gamma(n/3)).at n=25A284997
• Ceiling(Gamma(2n/3)).at n=12A284999
• Numbers k such that 351*2^k+1 is prime.at n=32A323032