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A077686
2^(n-1) - (prime(n) mod n).
0
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
CROSSREFS
Sequence in context: A191313 A078528 A309272 * A034499 A299159 A006451
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Feb 12 2003
STATUS
approved