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A115706 Primes whose digit reversal is a pentagonal number (A000326). 1
5, 29, 53, 541, 673, 2239, 5273, 6257, 7753, 10567, 10861, 10883, 15137, 27793, 28447, 28723, 29201, 52639, 54001, 56041, 59863, 62143, 67189, 67349, 74587, 76771, 103591, 103811, 104971, 108643, 157637, 212161, 217223, 229343, 241391 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..35.

EXAMPLE

541 is prime and 145 is the 10th pentagonal number.

CROSSREFS

Cf. A000326, A115707.

Sequence in context: A147153 A300777 A177831 * A031394 A103094 A341083

Adjacent sequences:  A115703 A115704 A115705 * A115707 A115708 A115709

KEYWORD

nonn,base

AUTHOR

Giovanni Resta, Jan 31 2006

STATUS

approved

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Last modified October 20 19:49 EDT 2021. Contains 348118 sequences. (Running on oeis4.)