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A120825 Primes with n consecutive digits ascending beginning with the digit seven. 8
1, 5, 15, 51 (list; graph; refs; listen; history; internal format)
OFFSET

1,2

COMMENTS

Digits are in ascending order beginning with 7 and after 9 comes 0.

The sequence "Primes with n consecutive digits descending beginning with the digit seven" has only two terms below 6001, namely 1 & 5 which represents the primes 7 & 76543.

EXAMPLE

15 is term since 789012345678901 is a prime.

MATHEMATICA

fQ[n_] := PrimeQ@ FromDigits@ Mod[6+Range@n, 10]; lst = {}; Do[ If[fQ@n, AppendTo[lst, n]; Print@n], {n, 5000}]; lst

CROSSREFS

Cf. A006055, A120819, A120820, A120821, A120822, A120823, A120824, A120826, A120827.

Sequence in context: A034539 A029609 A014274 * A199985 A149576 A149577

Adjacent sequences:  A120822 A120823 A120824 * A120826 A120827 A120828

KEYWORD

base,bref,hard,nonn

AUTHOR

Robert G. Wilson v (rgwv(AT)rgwv.com), Jul 05 2006

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Last modified February 16 04:18 EST 2012. Contains 205860 sequences.