A237601 Number of n-digit right-truncatable primes in base 16.

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

Offset: 1

Author

Stanislav Sykora, Feb 15 2014

Keywords

• nonn
• base

Comments

See A237600 for a complete list of right-truncatable primes in base 16.

Examples

			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.
		

Links

• Stanislav Sykora, PARI/GP scripts for genetic threads

Crossrefs

Cf. A050986 (base 10), A237600, A237602.

Programs

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

Formula

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