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A261142 Numbers n such that n, p=prime(n) and q=prime(p) have the same sum of digits. 0
88, 248, 826, 1417, 1571, 1595, 3682, 3928, 4448, 5089, 5137, 6479, 7754, 8038, 8384, 8461, 9257, 9640, 10393, 10825, 10922, 11878, 13294, 14290, 14767, 14941, 15977, 16786, 17684, 17777, 17935, 18437, 18677, 19495, 20497, 20555, 21649, 22487, 23239, 23396 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Hence both p and q are Honaker primes (A033548) and both n and p are terms in A033549.

LINKS

Table of n, a(n) for n=1..40.

EXAMPLE

n=88, p=prime(n)=457 and q=prime(p)=3229 have the same sum of digits=16;

n=248, p=prime(n)=1571 and q=prime(p)=13217 have the same sum of digits=14;

n=660349, p=178115131 and q=178115131 have the same sum of digits=28.

CROSSREFS

Cf. A000040, A000720, A007953, A033548, A033549.

Sequence in context: A116448 A046330 A304519 * A001347 A003782 A235026

Adjacent sequences:  A261139 A261140 A261141 * A261143 A261144 A261145

KEYWORD

nonn,base

AUTHOR

Zak Seidov, Oct 22 2015

STATUS

approved

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Last modified February 16 14:47 EST 2019. Contains 320163 sequences. (Running on oeis4.)