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A096869
Difference between the n-th repunit and the next prime.
3
1, 2, 2, 6, 2, 8, 40, 6, 2, 10, 2, 38, 28, 12, 118, 12, 8, 20, 60, 20, 46, 78, 6, 2, 102, 272, 80, 246, 6, 80, 102, 36, 116, 10, 36, 10, 238, 32, 20, 6, 78, 412, 88, 426, 118, 172, 48, 58, 112, 8, 56, 430, 90, 136, 240, 30, 140, 232, 162, 40, 226, 48, 116, 60, 690, 146, 210
OFFSET
1,2
FORMULA
a(n) = A096497(n) - A002275(n) = A096499(n) - A096870(n).
MATHEMATICA
NextPrim[n_] := Block[{k = n + 1}, While[ !PrimeQ[k], k++ ]; k]; Table[ NextPrim[(10^n - 1)/9] - (10^n - 1)/\ 9, {n, 70}]
CROSSREFS
Cf. A096870.
Sequence in context: A193388 A291840 A208448 * A345315 A154009 A297792
KEYWORD
nonn
AUTHOR
Robert G. Wilson v, Jul 12 2004
STATUS
approved