3686400

Appears in sequences

• Expansion of (1 + 2*x)/(1 - 2*x)^3.at n=14A014477
• Sum of the non-unitary divisors of A064115(n) (or of 1+A064115(n)).at n=20A103846
• Number of different ways n! can be represented as the difference of two squares; also, for n >= 4, half the number of positive integer divisors of n!/4.at n=32A138196
• a(n) = 4^n*(2n + 1)^2.at n=7A164583
• Totally multiplicative sequence with a(p) = 8*(p+3) for prime p.at n=35A167327
• a(0)=1. For n >=1, a(n) = the smallest positive multiple of a(n-1) such that (the n-th prime)+a(n) is prime.at n=22A175195
• a(0)=1. For n >=1, a(n) = the smallest positive multiple of a(n-1) such that (the n-th prime)+a(n) is prime.at n=23A175195
• Squares that can be written as a sum of 3 distinct nonzero squares in exactly two ways.at n=21A207640
• Cyclic quadrilateral numbers: numbers m = a*b*c*d such that the integers a,b,c,d are the sides of a cyclic quadrilateral whose area and circumradius are integers.at n=14A218431
• Decimal representation of the diagonal from the origin to the corner of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 326", based on the 5-celled von Neumann neighborhood.at n=21A287713
• Number of minimum total dominating sets in the n-transposition graph.at n=4A303143
• Triangular array, read by rows: T(n,k) = denominator of Jtilde_k(n), 1 <= k <= 2*n+2.at n=33A326748
• Primorial deflation of A330687 (record positions in A050377): a(n) is the unique integer x such that A108951(x) = A330687(n).at n=33A330689
• Obverse convolution (n^2 - n)**(n^2 - n); see Comments.at n=5A375056
• Triangle of denominators for rational convergents to Taylor series of 1/Gamma(x+1).at n=40A386676
• Powers k^m, m > 1, where k is neither squarefree nor squareful and is a product of primorials.at n=32A389397