51555

Appears in sequences

• Every prefix prime in base 6 (written in base 6).at n=30A024766
• Numbers having four 5's in base 10.at n=6A043512
• Number of nonempty subsets of {1,2,...,n} in which exactly 2/3 of the elements are <= (n-4)/2.at n=22A048062
• Matrix cube of triangle A104980.at n=21A104990
• Number of integer partitions of n whose multiplicities have integer median.at n=42A360687