A247148 Primes p that divide LS(p), where LS is the "Look and Say" function (A045918).

2, 5, 108947, 4940867

Offset

1,1

Comments

a(5) > 4*10^12. - Tyler Busby, Feb 02 2023

Links

Table of n, a(n) for n=1..4.

Chris K. Caldwell and G. L. Honaker, Prime Curio for 108947

Example

a(2)=5, because 5 is prime and divides LS(5) or 15.

Crossrefs

Cf. A000040, A045918, A079342.

Sequence in context: A090071 A319898 A325957 * A139062 A241861 A340984

Adjacent sequences: A247145 A247146 A247147 * A247149 A247150 A247151

Keyword

nonn,more,hard,base

Author

G. L. Honaker, Jr., Nov 20 2014

Extensions

a(4) from Alois P. Heinz, Nov 20 2014

Status

approved