4086860domain: NAppears in sequencesa(n) = a(1) + a(2) + ... + a(n-1) + a(m) for n >= 4, where m = n - 1 - 2^p and p is the unique integer such that 2^p < n - 1 <= 2^(p+1), starting with a(1) = 1, a(2) = 3, and a(3) = 2.at n=22A049970G.f.: Sum_{n=-oo..+oo} x^n * (1 - x^n)^n / (1 - x)^n.at n=22A262007