150163

Appears in sequences

• Solution of the complementary equation a(n) = a(n-1) + a(n-2) + b(n-1) + b(n-2) - n, where a(0) = 1, a(1) = 2, b(0) = 3, and (a(n)) and (b(n)) are increasing complementary sequences.at n=21A294553
• a(n) = (1/4) * Sum_{k=0..floor(n/3)} (n-2*k+2) * 2^k * binomial(2*n-4*k+2,2*k+1).at n=12A391837