A089758 - 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

A089758 as a simple table

n	a(n)
1	31
2	631
3	9631
4	129631
5	27129631
6	3027129631
7	393027129631
8	42393027129631
9	6642393027129631
10	1626642393027129631
11	2311626642393027129631
12	2522311626642393027129631
13	2582522311626642393027129631

[31,631,9631,129631,27129631,3027129631, 393027129631,42393027129631,6642393027129631, 1626642393027129631,2311626642393027129631, 2522311626642393027129631, 2582522311626642393027129631]