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A048518 Primes containing only two different digits whose sum of digits is 28, the second perfect number. 1
1999, 9199, 338383, 383833, 1181881, 1881181, 1881811, 2222929, 2922229, 8118181, 8188111, 8881111, 9222229, 15551551, 15555151, 15555511, 16166611, 16616161, 33333373, 33733333, 34434343, 44334343, 44343433, 51155551 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

COMMENTS

Calculated by Robert T. McQuaid (robert.mcquaid(AT)headwaters.com).

LINKS

Table of n, a(n) for n=0..23.

C. Rivera, Source from Carlos Rivera's Puzzle Site.

MATHEMATICA

Select[Prime[Range[3100000]], Count[DigitCount[#], 0]==8&&Total[ IntegerDigits[ #]]==28&] (* Harvey P. Dale, Jun 11 2016 *)

CROSSREFS

Cf. A000396, A048517.

Sequence in context: A230202 A037029 A048517 * A043416 A125680 A162238

Adjacent sequences:  A048515 A048516 A048517 * A048519 A048520 A048521

KEYWORD

nonn,base

AUTHOR

Patrick De Geest, May 15 1999

EXTENSIONS

More terms from Naohiro Nomoto, Jul 28 2001

STATUS

approved

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Last modified October 1 04:05 EDT 2020. Contains 337441 sequences. (Running on oeis4.)