253570

Appears in sequences

• a(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) = a(2) = 1 and a(3) = 3.at n=19A049894
• Number of integer partitions of n with parts colored by {0, 1, 2, 3} such that the sum of colors is congruent to 1 (mod 4).at n=18A387957