A048402 - OEIS

A048402

Primes with consecutive digits that differ exactly by 5.

2, 3, 5, 7, 61, 83, 383, 727, 72727, 94949, 1616161, 383838383, 727272727, 383838383838383, 38383838383838383, 72727272727272727, 94949494949494949, 383838383838383838383

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OFFSET

1,1

LINKS

Harvey P. Dale, Table of n, a(n) for n = 1..30

MATHEMATICA

Module[{nn=50, w1, w2}, w1=Flatten[Table[Select[FromDigits/@Table[ PadRight[ {}, n, {a, a+5}], {n, 2, nn}], PrimeQ], {a, 4}]]; w2=Flatten[Table[Select[ FromDigits/@ Table[PadRight[{}, n, {a+5, a}], {n, 2, nn}], PrimeQ], {a, 4}]]; Join[ {2, 3, 5, 7}, w1, w2]//Union] (* Harvey P. Dale, Jan 09 2021 *)

CROSSREFS

Cf. A048398, A048399, A048400, A048401, A048403, A048404, A048405, A048407.

Sequence in context: A244595 A244597 A237439 * A237440 A237441 A171029

Adjacent sequences: A048399 A048400 A048401 * A048403 A048404 A048405

KEYWORD

nonn,base

AUTHOR

Patrick De Geest, Apr 15 1999

STATUS

approved