1
Antti Karttunen, Table of n, a(n) for n = 1..65537
Index entries for characteristic functions
(PARI) A185705(n) = ((1==(n%10))&&isprime(n)); \\ Antti Karttunen, Sep 21 2018
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
nonn,base
N. J. A. Sloane, Feb 10 2011
approved