262159

Appears in sequences

• Partial sums of A000051, starting at n=1.at n=16A145071
• Semi-sums (average) of two (not necessarily distinct) Mersenne primes (A000668).at n=23A169628
• Semi-sums (average) of any two distinct Mersenne primes (A000668).at n=17A171253
• a(n) = A070952(2^n).at n=18A246023