21714

Appears in sequences

• Fibonacci sequence beginning 0, 22.at n=16A022356
• Number of partitions in parts not of the form 17k, 17k+1 or 17k-1. Also number of partitions with no part of size 1 and differences between parts at distance 7 are greater than 1.at n=48A035962
• Smallest multiple of n using all the digits of all its divisors (a permutation of the concatenation of its divisors), or 0 if no such number exists.at n=13A077351
• Bisect A053445 then calculate the first differences of the resulting sequence.at n=35A160643
• Number of n-digit 6th powers.at n=28A216656
• Volume of elliptic cone (rounded down) with semi-minor axis = height = n and semi-major axis = 3*n/2.at n=23A228391
• Let x(1)x(2)...x(q) the decimal expansion of the numbers k having exactly q distinct prime divisors p(1) < p(2) < ... < p(q). Sequence lists the numbers k such that p(1)/x(q) + p(2)/x(q-1)+ ... + p(q)/x(1) is an integer.at n=26A235153
• If n is 0, 1, or prime, a(n) = n; else a(n) = a(n-1) + a(n-2).at n=45A265822
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 502", based on the 5-celled von Neumann neighborhood.at n=35A272579
• Number of 3D walks of type abb.at n=4A302181
• Number of 3D walks of type abc.at n=8A302182
• G.f. A(x) satisfies: A(x) = 1 + x*A(x)^3/(1 - x).at n=7A307678
• Numbers k such that 8k+1, 12k+1 and 24k+1 are primes and the last two are also of the form x^2 + 27y^2, so the tetrahedral number T(24k+1) is a Fermat pseudoprime to base 2.at n=14A321867
• Perimeters of nondegenerate triangles with integer areas, whose side lengths are triangular numbers.at n=39A385737