664658

Appears in sequences

• Total number of distinct nilpotent subgroups of the symmetric group, counting conjugates as distinct.at n=9A218939
• Solution of the complementary equation a(n) = 3*a(n-1) + b(n-1) - 1, where a(0) = 1, a(1) = 2, b(0) = 3, and (a(n)) and (b(n)) are increasing complementary sequences.at n=12A295134