22255

Appears in sequences

• Numbers using only the digits 2 and 5, that are both curved and straight.at n=33A072961
• Index k in A095773 where a string of n identical values occurs.at n=30A096183
• Semiprimes (A001358) made of nontrivial runs of identical digits.at n=25A116063
• In the "3x+1" problem, let 1 denote a halving step and 0 denote an x->3x+1 step. Then a(n) is obtained by writing the sequence of steps needed to reach 1 from 2n and reading it as a decimal number.at n=10A125711
• Number of parts > 1 in the last section of the set of partitions of n.at n=35A138135
• Number of parts in all partitions of 2n that do not contain 1 as a part.at n=18A182734
• Composite numbers whose concatenation of their aliquot parts, in ascending order, is a palindrome.at n=32A249300