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

 

Logo

Please make a donation to keep the OEIS running. We are now in our 56th year. In the past year we added 10000 new sequences and reached almost 9000 citations (which often say "discovered thanks to the OEIS").
Other ways to donate

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

A026161 as a simple table

n a(n)
1 2
2 10
3 60
4 343
5 1967
6 11308
7 65259
8 378010
9 2197063
10 12808546
11 74873071
12 438719043
13 2576121325
14 15155321640
15 89309379504
16 527093971974
17 3115115536016
18 18433166325980
19 109198600599788
20 647564817644547
21 3843804160133055
22 22835904897612060
23 135776623595204700
24 807896288987793486

[2,10,60,343,1967,11308,65259,378010,2197063,
 12808546,74873071,438719043,2576121325,
 15155321640,89309379504,527093971974,
 3115115536016,18433166325980,109198600599788,
 647564817644547,3843804160133055,
 22835904897612060,135776623595204700,
 807896288987793486]

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 December 5 03:31 EST 2020. Contains 338943 sequences. (Running on oeis4.)