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A209663 Numbers n with property that n is prime, n+18 is prime and both have equal sum of digits. 4
5, 13, 19, 23, 29, 43, 53, 79, 109, 113, 139, 149, 163, 173, 179, 223, 233, 239, 263, 313, 349, 379, 439, 443, 449, 491, 503, 523, 569, 613, 643, 659, 673, 691, 709, 733, 739, 743, 769, 809, 839, 859, 863, 919, 929, 953, 1013, 1033, 1069, 1091, 1153, 1163 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Supersequence of A066540.

LINKS

Table of n, a(n) for n=1..52.

EXAMPLE

613 is in the sequence because 613 is prime, 613+18 = 631 is also prime. Sum_of_digits(613) = 10 and Sum_of_digits(631) = 10.

PROG

(MAGMA) [p: p in PrimesUpTo(1200) | IsPrime(p+18) and  &+Intseq(p) eq &+Intseq(p+18)]; // Bruno Berselli, Mar 13 2012

CROSSREFS

Cf. A066540.

Sequence in context: A272723 A245177 A067463 * A156111 A162174 A171603

Adjacent sequences:  A209660 A209661 A209662 * A209664 A209665 A209666

KEYWORD

nonn,base

AUTHOR

Antonio Roldán, Mar 13 2012

STATUS

approved

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Last modified July 25 04:48 EDT 2017. Contains 289779 sequences.