login
This site is supported by donations to The OEIS Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A107611 Indices of primes with digit product = 2. 2
1, 47, 318, 10546, 10552, 10629, 86544, 56196114, 56200915, 56676030, 4555804158, 4559732893, 77220966866 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Next term is A000720(111111111111112111) > A000720(10^17) > 2*10^15.

LINKS

Table of n, a(n) for n=1..13.

FORMULA

a(n) = A000720(A107612(n)). - David Wasserman, May 07 2008

MATHEMATICA

Do[If[Apply[Times, IntegerDigits[Prime[n]]]==2, Print[n]], {n, 100000}]

CROSSREFS

Corresponding primes in A107612.

Cf. A053666, A101987, A107612.

Sequence in context: A069760 A140043 A074774 * A219442 A055828 A244770

Adjacent sequences:  A107608 A107609 A107610 * A107612 A107613 A107614

KEYWORD

more,nonn,base

AUTHOR

Zak Seidov, May 17 2005

EXTENSIONS

More terms from Ryan Propper, Jan 03 2008

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified May 20 12:33 EDT 2019. Contains 323422 sequences. (Running on oeis4.)