A307478 SanD-140 primes: primes p such that p+d is also prime and sum of digits A007953(p(p+d)) = d, with d = 140.

999999893, 1396348013, 1411310597, 1414138763, 1652231723, 1664027567, 1673289773, 1696168847, 1727975297, 1731718697, 1731758543, 1944733793, 1946264813, 1946778797, 1983934097, 1996963847, 1998946847, 1999999871, 2142402293, 2167665263, 2185769513, 2190177263, 2222161013, 2224833137

Offset

1,1

Comments

SanD-d primes exist only for d = 14 + 18*k, k = -1/2, 0, 1, 2, 3, ...

This is the sequence for k = 7. See cross-references for other k and related sequences, in particular the main entry A307479.

Links

Table of n, a(n) for n=1..24.

Prog

(PARI) print_A307478(N, d=140)=forprime(p=2, , isprime(p+d)&&sumdigits(p*(p+d))==d&&!print1(p, ", ")&&!N--&&break)

Crossrefs

Cf. A307471 - A307477 (d = 14+18k, k=0..6), A307479 (any d: main entry), A307480 (smallest SanD prime for given d).

Cf. A000040 (primes), A007953 (sum of digits).

Sequence in context: A287171 A136953 A136961 * A100909 A260519 A260520

Adjacent sequences: A307475 A307476 A307477 * A307479 A307480 A307481

Keyword

nonn,base

Author

M. F. Hasler, Apr 09 2019

Status

approved