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

 

Logo


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

A002215 as a simple table

n a(n)
1 1
2 1
3 2
4 3
5 6
6 10
7 20
8 36
9 72
10 137
11 274
12 543
13 1086
14 2219
15 4438
16 9285
17 18570
18 39587
19 79174
20 171369
21 342738
22 751236
23 1502472
24 3328218
25 6656436
26 14878455
27 29756910
28 67030785
29 134061570
30 304036170
31 608072340
32 1387247580
33 2774495160

[1,1,2,3,6,10,20,36,72,137,274,543,1086,2219,4438,
 9285,18570,39587,79174,171369,342738,751236,
 1502472,3328218,6656436,14878455,29756910,
 67030785,134061570,304036170,608072340,1387247580,
 2774495160]

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 13 02:59 EST 2019. Contains 329085 sequences. (Running on oeis4.)