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

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A135321 a(n) = 10^n * 9^(n^2). 2
1, 90, 656100, 387420489000, 18530201888518410000, 71789798769185258877024900000, 22528399544939174411840147874772641000000 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

COMMENTS

Hankel transform of A131521 .

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 0..30

FORMULA

a(n) = 10^n * 9^(n^2) = A011557(n) * A060761(n).

MATHEMATICA

Table[10^n * 9^(n^2), {n, 0, 10}] (* G. C. Greubel, Oct 09 2016 *)

PROG

(MAGMA) [10^n*9^(n^2): n in [0..10]]; // Vincenzo Librandi, May 31 2011

(PARI) a(n)=10^n*9^(n^2) \\ Charles R Greathouse IV, Oct 09 2016

CROSSREFS

Sequence in context: A052277 A172671 A066784 * A135428 A028672 A172650

Adjacent sequences:  A135318 A135319 A135320 * A135322 A135323 A135324

KEYWORD

nonn,easy

AUTHOR

Philippe Deléham, Dec 06 2007

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 October 21 20:44 EDT 2019. Contains 328315 sequences. (Running on oeis4.)