A204991 - OEIS

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A204991

2^k-2^j, where (2^k,2^j) is the least pair of distinct positive powers of 2 for which n divides 2^k-2^j.

5

2, 2, 6, 4, 30, 6, 14, 8, 126, 30, 2046, 12, 8190, 14, 30, 16, 510, 126, 524286, 60, 126, 2046, 4094, 24, 2097150, 8190, 524286, 28, 536870910, 30, 62, 32, 2046, 510, 8190, 252, 137438953470, 524286, 8190, 120, 2097150, 126, 32766, 4092, 8190

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OFFSET

1,1

COMMENTS

For a guide to related sequences, see A204892.

LINKS

Table of n, a(n) for n=1..45.

MATHEMATICA

(See the program at A204987.)

CROSSREFS

Cf. A204987, A204892, A204990=(1/2)(A204991).

Sequence in context: A317368 A259882 A356187 * A054516 A062400 A375851

Adjacent sequences: A204988 A204989 A204990 * A204992 A204993 A204994

KEYWORD

nonn

AUTHOR

Clark Kimberling, Jan 21 2012

STATUS

approved