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A242386 Lesser of consecutive primes whose sum is a palindromic number. 2
2, 3, 109, 211, 347, 409, 1051, 1493, 2111, 2273, 3167, 4219, 4441, 10099, 10853, 10903, 11353, 11909, 12823, 12973, 13421, 13831, 14543, 14639, 20551, 21011, 21347, 21661, 21863, 22271, 23581, 23981, 30047, 30557, 31259, 31307, 31963, 32069, 32213, 32467, 32869, 33029 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Chai Wah Wu, Table of n, a(n) for n = 1..10000

EXAMPLE

2111 is in the sequence because 2111 is prime, nextprime(2111) = 2113 and 2111 + 2113 = 4224, palindromic number.

PROG

(PARI)

palind(n)=Str(n)==concat(Vecrev(Str(n)))

{k=2; while(k<10^5, m=nextprime(k+1); if(palind(k+m), print1(k, ", ")); k=m)}

CROSSREFS

Cf. A162571 (resulting palindromes), A242387.

Sequence in context: A129729 A109349 A235619 * A114373 A117700 A084755

Adjacent sequences:  A242383 A242384 A242385 * A242387 A242388 A242389

KEYWORD

nonn,base

AUTHOR

Antonio Roldán, May 12 2014

STATUS

approved

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Last modified December 15 04:23 EST 2019. Contains 329991 sequences. (Running on oeis4.)