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

1,1

Comments

See A237600 for a complete list of right-truncatable 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 * A372669 A064602 A360650

Adjacent sequences: A237598 A237599 A237600 * A237602 A237603 A237604

Keyword

nonn,base

Author

Stanislav Sykora, Feb 15 2014

Status

approved