A159222 - OEIS

The OEIS is supported by the many generous donors to the OEIS Foundation.

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 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).

Other ways to Give

A159222 as a simple table

n	a(n)
2	7
3	20
4	45
5	95
6	193
7	389
8	777
9	1553
10	3097
11	6185
12	12345
13	24665
14	49273
15	98489
16	196857
17	393593
18	786937
19	1573625
20	3146745
21	6292985
22	12584953
23	25168889
24	50335737
25	100669433
26	201334777
27	402665465

[7,20,45,95,193,389,777,1553,3097,6185,12345, 24665,49273,98489,196857,393593,786937,1573625, 3146745,6292985,12584953,25168889,50335737, 100669433,201334777,402665465]