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

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A157138 Even numbers n with equal number of even digits in n and n-th prime. 0
10, 14, 18, 38, 48, 52, 54, 58, 60, 70, 76, 80, 82, 86, 92, 94, 96, 98, 112, 114, 124, 132, 136, 138, 140, 142, 144, 158, 170, 174, 180, 192, 194, 198, 234, 236, 252, 254, 258, 290, 306, 318, 320, 324, 326, 342, 348, 350, 352, 356, 364, 366, 368, 370, 374, 376 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Can this sequence be proved to be infinite?

LINKS

Table of n, a(n) for n=1..56.

EXAMPLE

If prime(n=14=even number)=43 and 1(4=even digit)=1(4=even digit), then 14=a(1). If prime(n=18=even number)=61 and 1(8=even digit)=1(6=even digit), then 18=a(2). If prime(n=30=even number)=113 and 0=0, then 30=a(3). If prime(n=38=even number)=163 and 1(8=even digit)=1(6=even digit), then 38=a(4)

CROSSREFS

Cf. A000027, A000040, A155548.

Sequence in context: A250197 A055985 A190888 * A131693 A255532 A307516

Adjacent sequences:  A157135 A157136 A157137 * A157139 A157140 A157141

KEYWORD

nonn,base,less

AUTHOR

Juri-Stepan Gerasimov, Feb 24 2009

EXTENSIONS

Roughly 50 percent of the entries corrected by R. J. Mathar, Feb 26 2009

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 April 20 03:36 EDT 2019. Contains 322294 sequences. (Running on oeis4.)