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!)
A071584 Powers of 7 written backwards. 1
1, 7, 94, 343, 1042, 70861, 946711, 345328, 1084675, 70635304, 942574282, 3476237791, 10278214831, 70401098869, 948270322876, 3499051657474, 10696503923233, 702789315036232, 9440197953148261, 34137358159889311 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Alois P. Heinz, Table of n, a(n) for n = 0..1000

MAPLE

a:= n-> (s-> parse(cat(s[-i]$i=1..length(s))))(""||(7^n)):

seq(a(n), n=0..50);  # Alois P. Heinz, Apr 09 2015

MATHEMATICA

FromDigits[Reverse[IntegerDigits[#]]]&/@(7^Range[0, 20]) (* Harvey P. Dale, Apr 29 2012 *)

PROG

(PARI) for(i=1, 50, n=5^i; s=ceil(log(n)/log(10)); print1(sum(i=0, s, 10^(s-i-1)*(floor(n/10^i)-10*floor(n/10^(i+1)))), ", "))

CROSSREFS

Sequence in context: A220405 A109304 A134113 * A132114 A221384 A243679

Adjacent sequences:  A071581 A071582 A071583 * A071585 A071586 A071587

KEYWORD

easy,nonn,base

AUTHOR

Benoit Cloitre, Jun 01 2002

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 June 12 16:55 EDT 2021. Contains 344959 sequences. (Running on oeis4.)