Logo

A001821 formatted as a simple table:

n a(n)
0 1
1 30
2 1023
3 44473
4 2475473
5 173721912
6 15088541896
7 1593719752240
8 201529405816816
9 30092049283982400
10 5242380158902146624 

[1,30,1023,44473,2475473,173721912,15088541896,
 1593719752240,201529405816816,30092049283982400,
 5242380158902146624]

Lookup | Welcome | Find friends | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Transforms | Puzzles | Hot | Classics
More pages | Superseeker | Maintained by N. J. A. Sloane (njas@research.att.com)

Last modified November 29 12:46 EST 2009. Contains 167659 sequences.

AT&T Labs Research

Legal Notice
© 2009 AT&T Intellectual Property. All Rights Reserved.