A247001 A246335(2^n-1).

1, 5, 21, 85, 317, 1157

Offset

0,2

Comments

Mysteriously different from A002450.

Links

Table of n, a(n) for n=0..5.

Crossrefs

Cf. A246333, A246334, A246335, A002450.

Sequence in context: A289797 A246986 A272547 * A271157 A255451 A028948

Adjacent sequences: A246998 A246999 A247000 * A247002 A247003 A247004

Keyword

nonn,more

Author

N. J. A. Sloane, Sep 21 2014

Status

approved