login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A217416 Numbers of the form 2^r*13^s whose decimal representations are such that each digit 0-9 appears a prime number of times. 12
19461082905477938625332224, 1493825030770756769826391724130304, 1341437769548771819714842333610521088, 1888426137230419620556768936800026624 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

See the formula section for more data, and the other sequences in cross-reference for similar and motivation.

LINKS

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

FORMULA

a(n) = 2^A217417(n) * 13^A217418(n).

EXAMPLE

A217417(1)=10 and A217418(1)=20, so this sequence's first term can be simply written as 338^10 (338=2*13^2).  It has two each of 0's, 1's, 5's, 6's, 7's and 8's; three each of 3's, 4's and 9's; and five 2's.

CROSSREFS

Cf. A217854, A217417, A217418, A217404, A217407, A217410, A217413, A217419, A217422, A217425, A217428, A217431.

Sequence in context: A009190 A095444 A309072 * A133849 A343357 A324208

Adjacent sequences:  A217413 A217414 A217415 * A217417 A217418 A217419

KEYWORD

nonn,base,less

AUTHOR

James G. Merickel, Oct 03 2012

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 September 19 08:05 EDT 2021. Contains 347556 sequences. (Running on oeis4.)