30081

Appears in sequences

• Number of ordered 5-tuples of integers from [ 1,n ] with no common factors among triples.at n=22A015656
• Decimal part of cube root of a(n) starts with 1: first term of runs.at n=29A034127
• "Sloping binary representation" of powers of 3 (A000244), slope = -1.at n=27A037095
• Number of strongly unimodal partitions of n (strongly unimodal means strictly increasing then strictly decreasing).at n=37A059618
• Divisors of 10^15 - 1.at n=33A111117
• Triangle T(n,m) = 2+A176697(n)-A176697(m)-A176697(n-m) read along rows 0<=m<=n.at n=57A176700
• Nonnegative values x of solutions (x, y) to the Diophantine equation x^2 + (x+479)^2 = y^2.at n=8A207075
• Fixed points of permutations A263265 and A263266.at n=17A263281
• G.f. A(x) satisfies A(x) = (1 + x / (1 - x*A(x))^2)^3.at n=7A365121
• Numbers k such that k^7*2^k + 1 is a prime.at n=19A367560