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A185705 Characteristic function of positive numbers that are primes ending in 1. 6
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 (list; graph; refs; listen; history; text; internal format)
OFFSET

1

LINKS

Antti Karttunen, Table of n, a(n) for n = 1..65537

Index entries for characteristic functions

PROG

(PARI) A185705(n) = ((1==(n%10))&&isprime(n)); \\ Antti Karttunen, Sep 21 2018

CROSSREFS

Cf. A030430 (primes of the form 10*n+1).

Primes ending in 1,3,7,9: A185705, A185706, A185708, A185709.

Sequence in context: A294937 A277156 A297040 * A277151 A277155 A277159

Adjacent sequences:  A185702 A185703 A185704 * A185706 A185707 A185708

KEYWORD

nonn,base

AUTHOR

N. J. A. Sloane, Feb 10 2011

STATUS

approved

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Last modified December 17 04:31 EST 2018. Contains 318192 sequences. (Running on oeis4.)