69960

Appears in sequences

• a(n) = n*(2*n+5)*(2*n+7).at n=24A035329
• Numbers that can be expressed as the difference of the squares of primes in exactly seven distinct ways.at n=19A092003
• Partial sums of hexagonal numbers with prime indices.at n=20A117962
• Integer squares y from the smallest solutions of y^2 = x*(a^N - x)*(b^N + x) (elliptic line, Weierstrass equation) with a and b legs in primitive Pythagorean triangles and N = 2. Sequence ordered in increasing values of leg a.at n=19A120210
• a(n) = floor(n^4/4).at n=23A131479
• First occurrence of a set of n consecutive numbers having at least one prime gap in their factorization: a(n) = smallest number of this set.at n=23A137723
• Sum of positive even numbers up to n^2.at n=22A235367
• On a spirally numbered square grid, with labels starting at 1, this is the number of steps that an (n,n+1) leaper makes before getting trapped, or -1 if it never gets trapped.at n=28A343178
• Positive integers k such that the decimal representation of 2^k ends with some permutation of the string "0123456789".at n=23A347164
• Expansion of 1/sqrt((1-x^4)^2 - 4*x^5).at n=39A383572