A261142 - OEIS

A261142

Numbers n such that n, p=prime(n) and q=prime(p) have the same sum of digits.

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

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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