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!)
A116064 Powerful numbers (A001694) made of nontrivial runs of identical digits. 1
7744, 665500, 774400, 5556600, 6655000, 7744000, 55566000, 66550000, 77440000, 447722888, 448855888, 555660000, 665500000, 774400000, 1155775544, 5500002244, 5511005500, 5556600000, 6655000000, 7744000000, 11000004488, 11122233444, 22244466888 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

A run of length 1 is trivial.

LINKS

Table of n, a(n) for n=1..23.

Index entries for sequences related to powerful numbers

EXAMPLE

448855888 = 2^4*13^3*113^2.

CROSSREFS

Cf. A001694, A033023.

Sequence in context: A116282 A187958 A052050 * A052070 A052099 A079035

Adjacent sequences:  A116061 A116062 A116063 * A116065 A116066 A116067

KEYWORD

nonn,base

AUTHOR

Giovanni Resta, Feb 13 2006

EXTENSIONS

a(16)-a(23) from Donovan Johnson, Jun 29 2011

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 August 15 00:52 EDT 2020. Contains 336484 sequences. (Running on oeis4.)