393180

Appears in sequences

• a(n) = 3*2^n - 2*n - 2.at n=17A097813
• 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=23A294553