login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo

Thanks to everyone who made a donation during our annual appeal!
To see the list of donors, or make a donation, see the OEIS Foundation home page.

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)

A003155 as a simple table

n a(n)
1 1
2 1
3 1
4 6
5 15
6 255
7 1897
8 92263
9 1972653
10 281035054
11 17635484470
12 7490694495750
13 1405083604458437
14 1789509008288411290

[1,1,1,6,15,255,1897,92263,1972653,281035054,
 17635484470,7490694495750,1405083604458437,
 1789509008288411290]

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 January 19 21:47 EST 2020. Contains 331066 sequences. (Running on oeis4.)