44015

Appears in sequences

• Numbers whose base-4 representation contains exactly four 2's and four 3's.at n=2A045157
• Numbers k such that 255*2^k-1 is prime.at n=46A050886
• 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=22A125711