112110

Appears in sequences

• Divide natural numbers in groups with prime(n) elements and add together.at n=25A034957
• Truncated square pyramid numbers: a(n) = Sum_{k = n..2*n} k^2.at n=36A050409
• Integers y such that for some integer x we have uphi(x) = uphi(y) = x-y, where uphi(n) = A047994(n) is the unitary totient function: If n = Product p_i^e_i, uphi(n) = Product (p_i^e_i - 1).at n=18A067741
• 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, 0), (-1, 0, -1), (0, 0, 1), (0, 1, 0), (1, -1, -1)}.at n=11A149815
• Primitive terms of A108569.at n=39A346277