33490

Appears in sequences

• Product of Fibonacci and Pell numbers.at n=8A001582
• Expansion of a modular function for Gamma_0(15).at n=19A002510
• Denominators of the first differences of 1/(n^2 + 1).at n=13A033466
• First differences of A002065.at n=4A063573
• Composite n such that (n-1)*phi(n) is a perfect square.at n=28A069953
• Number of compositions (ordered partitions) of n into powers of 4.at n=34A087221
• G.f. satisfies A(x) = f(x) + x*A(x)*f(x)^3, where f(x) = Sum_{k>=0} x^((4^k-1)/3).at n=11A087223
• Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, 1), (-1, 1, -1), (0, 0, 1), (1, 0, 1), (1, 1, -1)}.at n=8A150383
• Numbers n such that A193232(n) is a triangular number.at n=15A220518
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 437", based on the 5-celled von Neumann neighborhood.at n=35A272155
• Numbers of the form m^2 + 1 that can be expressed in more than one way as j^2 + k^2 with j > k > 1.at n=36A299708
• Numbers of the form m^2 + 1 that can be expressed in more than one way as j^2 + k^2 with j > k > 1 and gcd(j,k) = 1.at n=20A300166
• Numbers k such that the two perfect powers immediately adjacent to k^2 both have exponents greater than 2.at n=26A340643
• Integers of the form k^2 + 1, where k >= 1, that are the product of two other integers of the form k^2 + 1, where k >= 1.at n=18A372496