129141

Appears in sequences

• Number of odd split numbers (A036382) of which the binary order (A029837) is <= n, i.e., those which occur below 2^n.at n=18A036388
• Solution of the complementary equation a(n) = a(n-1) + a(n-2) + b(n-1) + b(n-2) + 2*n, where a(0) = 1, a(1) = 2, b(0) = 3, and (a(n)) and (b(n)) are increasing complementary sequences.at n=19A294558