248699

Appears in sequences

• a(n) = a(n-1) + 3*a(n-2).at n=15A006138
• Number of forests of B-trees of order 3 with n labeled leaves.at n=29A058518
• Numbers whose set of base 12 digits is {0,B}, where B base 12 = 11 base 10.at n=29A097258