107512

Appears in sequences

• Group the composite numbers so that the sum of the n-th group is a multiple of the n-th prime: (4), (6), (8, 9, 10, 12, 14, 15, 16, 18, 20, 21, 22), (24, 25), (26, 27, 28, 30, 32), (33, 34, ...), ... Sequence gives sum of n-th group.at n=23A074124
• G.f. A(x) satisfies 0 = A(0) and 0 = f(x, A(x)) where f(u, v) = (v - u) * (1 + u*v) - v * (v + u).at n=10A245734