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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 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..67.

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 * A154009 A297792 A266722

Adjacent sequences:  A096866 A096867 A096868 * A096870 A096871 A096872

KEYWORD

nonn

AUTHOR

Robert G. Wilson v, Jul 12 2004

STATUS

approved

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Last modified November 25 20:20 EST 2020. Contains 338627 sequences. (Running on oeis4.)