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 A118507 Larger of two consecutive Sophie Germain primes with the same digital sum. 0
 131, 509, 719, 761, 2693, 3593, 3821, 4019, 4073, 4391, 4409, 4481, 4733, 5171, 6131, 6263, 6581, 6761, 7121, 7541, 7841, 9473, 9629, 10163, 10253, 10271, 10331, 10709, 11831, 12653, 12671, 13229, 13553, 14081, 14153, 14249, 14321, 15773, 15791, 16253, 17291 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS EXAMPLE 113 and 131 are consecutive Sophie Germain primes that have the same digital sum, hence 131 is in the sequence. - Michel Marcus, Dec 01 2013 PROG (PARI) lista(nn) = {lastsd = 0; forprime(p=2, nn, if (isprime(2*p+1), digs = digits(p); sd = sum(i=1, #digs, digs[i]); if (sd == lastsd, print1(p, ", ")); lastsd = sd; ); ); } \\ Michel Marcus, Dec 01 2013 CROSSREFS Cf. A005384. Sequence in context: A068680 A276255 A142555 * A105837 A142205 A142807 Adjacent sequences:  A118504 A118505 A118506 * A118508 A118509 A118510 KEYWORD base,nonn AUTHOR Luc Stevens (lms022(AT)yahoo.com), May 06 2006 EXTENSIONS Missing term 6761 and more terms added by Michel Marcus, Dec 01 2013 STATUS approved

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Last modified May 24 06:53 EDT 2019. Contains 323529 sequences. (Running on oeis4.)