

A237601


Number of ndigit righttruncatable primes in base 16.


11



6, 16, 37, 60, 74, 77, 63, 39, 22, 11, 5, 2, 1, 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
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OFFSET

1,1


COMMENTS

See A237600 for a complete list of righttruncatable primes in base 16.


LINKS

Table of n, a(n) for n=1..38.
Stanislav Sykora, PARI/GP scripts for genetic threads


FORMULA

a(n) = 0 for n >= 15.


EXAMPLE

a(2)=16 because there are 16 right truncatable hex numbers with two hex digits: 25,29,2B,2F,35,3B,3D,53,59,71,7F,B3,B5,BF,D3,DF.


PROG

(PARI) See the link (use GT_DivMod0 with arguments "isprime" for "property" and 16 for "b").
(PARI) A237601=vector(15, n, #p=concat(apply(t>primes([t, t+1]*16), if(n>1, p)))) \\ M. F. Hasler, Nov 07 2018


CROSSREFS

Cf. A050986 (base 10), A237600, A237602.
Sequence in context: A171373 A048487 A124699 * A064602 A058272 A049712
Adjacent sequences: A237598 A237599 A237600 * A237602 A237603 A237604


KEYWORD

nonn,base


AUTHOR

Stanislav Sykora, Feb 15 2014


STATUS

approved



