A210397 - OEIS

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A210397 as a simple table

n	a(n)
1	7
2	59
3	549
4	5167
5	48689
6	458859
7	4324477
8	40755719
9	384099369
10	3619917187
11	34115652149
12	321520538079
13	3030147451297
14	28557409213979
15	269137272730989
16	2536465091434807
17	23904734913837209
18	225288474590274099

[7,59,549,5167,48689,458859,4324477,40755719, 384099369,3619917187,34115652149,321520538079, 3030147451297,28557409213979,269137272730989, 2536465091434807,23904734913837209, 225288474590274099]