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

 

Logo

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 56th year, we are closing in on 350,000 sequences, and we’ve crossed 9,700 citations (which often say “discovered thanks to the OEIS”).

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

A223955 as a simple table

n a(n)
1 4
2 85
3 3471
4 176893
5 9779558
6 556027700
7 31770135236
8 1805384910990
9 101606391647751
10 5657068092397559
11 311737148953336261
12 17023765723406625834
13 922742812050648219706

[4,85,3471,176893,9779558,556027700,31770135236,
 1805384910990,101606391647751,5657068092397559,
 311737148953336261,17023765723406625834,
 922742812050648219706]

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 November 30 21:20 EST 2021. Contains 349426 sequences. (Running on oeis4.)