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A306572 Numbers k whose decimal representation ends with that of pi(k) (where pi denotes the prime counting function A000720). 0
16, 17, 132, 254, 374, 494, 1196, 2348, 3487, 4624, 5757, 6886, 11373, 22517, 33597, 44639, 55646, 66644, 77629, 88580, 99550, 99551, 110486, 219572, 328268, 436699, 544946, 653052, 761059, 869024, 976855, 1084604, 1192399, 2159962, 3232398, 4303026, 4303027 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

This sequence contains the automorphic primes (A046883).

If p is an automorphic prime, then p-1 is a term of the sequence.

LINKS

Table of n, a(n) for n=1..37.

EXAMPLE

There are 7 prime numbers <= 17, and 17 ends with 7, hence 17 is a term.

There are 13 primes numbers <= 42, and 42 does not end with 13, hence 42 is not a term.

PROG

(PARI) pi=0; for (n=1, 4303027, if (n%10^max(1, #digits(pi+=isprime(n)))==pi, print1 (n ", ")))

CROSSREFS

Cf. A000720, A046883, A067248.

Sequence in context: A041532 A300133 A041534 * A041536 A041538 A033052

Adjacent sequences:  A306569 A306570 A306571 * A306573 A306574 A306575

KEYWORD

nonn,base

AUTHOR

Rémy Sigrist, Feb 24 2019

STATUS

approved

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Last modified November 21 22:16 EST 2019. Contains 329383 sequences. (Running on oeis4.)