A067270 - 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

A067270 as a simple table

n	a(n)
1	0
2	1
3	5
4	25
5	625
6	9376
7	90625
8	890625
9	7109376
10	12890625
11	212890625
12	1787109376
13	81787109376
14	59918212890625
15	259918212890625
16	3740081787109376
17	56259918212890625
18	256259918212890625
19	7743740081787109376

[0,1,5,25,625,9376,90625,890625,7109376,12890625, 212890625,1787109376,81787109376,59918212890625, 259918212890625,3740081787109376, 56259918212890625,256259918212890625, 7743740081787109376]