A355985 - OEIS

A355985

Primes whose reversal is a multiple of 16.

23, 61, 211, 257, 449, 487, 821, 829, 863, 2131, 2137, 2179, 2551, 2557, 2591, 2593, 2707, 2741, 2749, 2789, 2939, 2971, 4013, 4019, 4051, 4057, 4091, 4093, 4099, 4201, 4241, 4243, 4283, 4289, 4621, 4663, 4813, 4817, 6121, 6163, 6311, 6317, 6353, 6359, 6397

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OFFSET

1,1

LINKS

Table of n, a(n) for n=1..45.

EXAMPLE

257 is a term since 257 is prime and 752 = 16 * 47.

MATHEMATICA

Select[Prime[Range[1000]], Divisible[IntegerReverse[#], 16] &] (* Amiram Eldar, Jul 29 2022 *)

PROG

(PARI) is(n) = { fromdigits(Vecrev(digits(n)))%16==0 && isprime(n) } \\ Rémy Sigrist, Jul 29 2022

CROSSREFS

Subsequence of A355430, A355983 and A355984.

Primes whose reversal is a multiple of k: A355430 (k=2), {3} (k=3), A355983 (k=4), A045711 (k=5), A087762 (k=7), A355984 (k=8), {11} (k=11), A087764 (k=13), this sequence (k=16), A087765 (k=17), A087766 (k=19), A087767 (k=23).

Sequence in context: A069798 A067194 A355984 * A232235 A107692 A089823

Adjacent sequences: A355982 A355983 A355984 * A355986 A355987 A355988

KEYWORD

nonn,base

AUTHOR

Bernard Schott, Jul 29 2022

EXTENSIONS

More terms from Rémy Sigrist, Jul 29 2022

STATUS

approved