A077686 2^(n-1) - (prime(n) mod n).

1, 1, 2, 5, 15, 31, 61, 125, 251, 503, 1015, 2047, 4094, 8191, 16382, 32763, 65528, 131065, 262134, 524277, 1048566, 2097139, 4194290, 8388591, 16777194, 33554409, 67108842, 134217705, 268435434, 536870889, 1073741821, 2147483645, 4294967291, 8589934589

Offset

1,3

Links

Table of n, a(n) for n=1..34.

Crossrefs

Sequence in context: A191313 A078528 A309272 * A034499 A299159 A006451

Adjacent sequences: A077683 A077684 A077685 * A077687 A077688 A077689

Keyword

nonn

Author

N. J. A. Sloane, Feb 12 2003

Status

approved