64670

Appears in sequences

• Number of squares (of another matrix) in M_2(n) - the ring of 2 X 2 matrices over Z_n.at n=29A068197
• Number of partitions of prime(n) into prime parts smaller than itself.at n=27A168470
• Solution of the complementary equation a(n) = a(n-1) + a(n-2) + b(n), where a(0) = 1, a(1) = 4, b(0) = 2, b(1) = 3, b(2) = 5, and (a(n)) and (b(n)) are increasing complementary sequences.at n=19A295950