73359

Appears in sequences

• Number of nonempty subsets of {1,2,...,n} in which exactly 1/3 of the elements are <= (n-1)/2.at n=19A047172
• Number of nonempty subsets of {1,2,...,n} in which exactly 1/3 of the elements are <= (n-2)/2.at n=19A047183
• Number of partitions of n with some part repeated.at n=44A047967
• Indices k such that 9 plus the k-th triangular number is a perfect square.at n=11A154142
• First occurrence of n in A225399, or -1 if n does not appear in A225399.at n=43A225400
• Triangle where g.f. C = C(x,m) and related series S = S(x,m) and D = D(x,m) satisfy S = x*C*D, C = 1 + x*S*D, and D = 1 + m*x*S*C, as read by rows of coefficients T(n,k) of x^(2*n)*m^k in C(x,m) for n>=0, k=0..n.at n=74A278881
• Triangle where g.f. D = D(x,m) and related series S = S(x,m) and C = C(x,m) satisfy S = x*C*D, C = 1 + x*S*D, and D = 1 + m*x*S*C, as read by rows of coefficients T(n,k) of x^(2*n)*m^k in C(x,m) for n>=1, k=0..n.at n=69A278882
• Number of integer partitions of 2n containing at least one even part.at n=22A366527
• Index of the first occurrence of n in A076982.at n=44A368855