A204990 (1/2)*(A204991).

1, 1, 3, 2, 15, 3, 7, 4, 63, 15, 1023, 6, 4095, 7, 15, 8, 255, 63, 262143, 30, 63, 1023, 2047, 12, 1048575, 4095, 262143, 14, 268435455, 15, 31, 16, 1023, 255, 4095, 126, 68719476735, 262143, 4095, 60, 1048575, 63, 16383, 2046, 4095, 2047

Offset

1,3

Comments

For a guide to related sequences, see A204892.

Links

Table of n, a(n) for n=1..46.

Mathematica

(See the program at A204987.)

Crossrefs

Cf. A204987, A204892, A204991.

Sequence in context: A055234 A291051 A342640 * A367741 A328282 A332215

Adjacent sequences: A204987 A204988 A204989 * A204991 A204992 A204993

Keyword

nonn

Author

Clark Kimberling, Jan 21 2012

Status

approved