A050680 Positions of 3's in A048288.

5, 10, 12, 13, 31, 38, 43, 49, 51, 55, 59, 60, 76, 83, 85, 97, 117, 118

Offset

1,1

Links

Table of n, a(n) for n=1..18.

Patrick De Geest, Reversed Smarandache Concatenated Numbers, Prime factors from n down to 1

M. Fleuren, Factors and primes of Smarandache sequences.

M. Fleuren, Smarandache Factors and Reverse factors

Carlos Rivera, Puzzle 8. Primes by Listing, The Prime Puzzles and Problems Connection.

Crossrefs

Cf. A000422, A046462, A048288, A050679, A050681, A050682.

Sequence in context: A329773 A213520 A241145 * A293726 A313359 A162821

Adjacent sequences: A050677 A050678 A050679 * A050681 A050682 A050683

Keyword

nonn,base,hard,less,more

Author

Patrick De Geest, Aug 15 1999

Extensions

a(13)-a(16) from Sean A. Irvine, Aug 17 2021

Offset changed to 1 by and a(17)-a(18) from Jinyuan Wang, Sep 04 2021

Status

approved