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A048401 Primes with consecutive digits that differ exactly by 4. 1
2, 3, 5, 7, 37, 59, 73, 151, 373, 15959, 95959, 515951, 595159, 595951, 9515959, 51515159, 159595151, 159595951, 5151515951, 5159515159, 5159515951, 5951515151, 5951515951, 5959515151, 5959595951, 15151595951, 15951515159 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..27.

MATHEMATICA

pd[{a_, b_, c___}]:=Flatten[Table[Select[FromDigits/@Select[Tuples[ {a, b, c}, n], Union[Abs[Differences[#]]]=={4}&], PrimeQ], {n, 11}]]; Union[Join[{2, 3, 5, 7}, pd[{1, 5, 9}], pd[{3, 7}]]] (* Harvey P. Dale, Aug 23 2011 *)

CROSSREFS

Cf. A048398-A048405.

Sequence in context: A090713 A090912 A048416 * A288718 A289861 A160748

Adjacent sequences:  A048398 A048399 A048400 * A048402 A048403 A048404

KEYWORD

nonn,base,changed

AUTHOR

Patrick De Geest, Apr 15 1999

EXTENSIONS

More terms from Naohiro Nomoto, Jul 28 2001

STATUS

approved

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Last modified October 18 05:07 EDT 2019. Contains 328145 sequences. (Running on oeis4.)