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

 

Logo

Annual appeal: Please make a donation to keep the OEIS running! Over 6000 articles have referenced us, often saying "we discovered this result with the help of the OEIS".
Other ways to donate

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A061650 n*20^(n-1). 1
1, 40, 1200, 32000, 800000, 19200000, 448000000, 10240000000, 230400000000, 5120000000000, 112640000000000, 2457600000000000, 53248000000000000, 1146880000000000000, 24576000000000000000, 524288000000000000000 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Harry J. Smith, Table of n, a(n) for n=1,...,100

FORMULA

a(n)=n*20^(n-1).

PROG

(PARI) { for (n=1, 100, write("b061650.txt", n, " ", n*20^(n - 1)) ) } [From Harry J. Smith, Jul 25 2009]

CROSSREFS

Sequence in context: A004385 A152257 A229457 * A006101 A278381 A251202

Adjacent sequences:  A061647 A061648 A061649 * A061651 A061652 A061653

KEYWORD

easy,nonn

AUTHOR

Jason Earls (zevi_35711(AT)yahoo.com), Jun 14 2001

EXTENSIONS

Corrected and extended by Larry Reeves (larryr(AT)acm.org), Jun 18 2001

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 | More pages
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy .

Last modified November 21 07:11 EST 2017. Contains 294995 sequences.