A014927 - OEIS

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A014927 as a simple table

n	a(n)
1	1
2	25
3	457
4	7369
5	111049
6	1604041
7	22505929
8	309160393
9	4178995657
10	55776799177
11	736867805641
12	9652968253897
13	125562274081225
14	1623467149388233
15	20882244117621193
16	267394589311003081

[1,25,457,7369,111049,1604041,22505929,309160393, 4178995657,55776799177,736867805641,9652968253897, 125562274081225,1623467149388233, 20882244117621193,267394589311003081]