71799

Appears in sequences

• Generalized ballot numbers (first differences of Motzkin numbers).at n=13A002026
• Expansion of 1/((1-2x)(1-5x)(1-7x)(1-11x)).at n=4A025995
• Quasi-Carmichael numbers to base -9: squarefree composites n such that prime p|n ==> p+9|n+9.at n=5A029569
• Expansion of (1-x)*c(x/(1+x)), where c(x) is the g.f. of the Catalan numbers (A000108).at n=15A105695
• Triangle read by rows: T(n,k) is the number of short bushes with n edges and having the leftmost leaf at height k (a short bush is an ordered tree with no nodes of outdegree 1).at n=57A106489
• a(n) = smallest k having at least four prime divisors d such that (d + n) | (k + n).at n=8A202159
• Number of partitions of n into exactly 7 different parts with distinct multiplicities.at n=25A212118
• Expansion of (-2 +x^2 +x -x*sqrt(1-2*x-3*x^2))/(-1 +x -sqrt(1-2*x-3*x^2)).at n=14A244884
• Irregular triangle read by rows: T(n,m) = number of lattice paths of type A^Q terminating at point (n, m).at n=43A291083
• G.f. A(x) satisfies A(x) = 1 + x^3 * A(x)^2 / (1 - x).at n=23A346503