A003730 - OEIS

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A003730 as a simple table

n	a(n)
1	1
2	11
3	81
4	666
5	5431
6	44466
7	364061
8	2981201
9	24412606
10	199912706
11	1637069691
12	13405842666
13	109779463516
14	898976005896
15	7361648869421
16	60284005131851
17	493661316969811
18	4042556485091321
19	33104199931650186

[1,11,81,666,5431,44466,364061,2981201,24412606, 199912706,1637069691,13405842666,109779463516, 898976005896,7361648869421,60284005131851, 493661316969811,4042556485091321, 33104199931650186]

[1,11,81,666,5431,44466,364061,2981201,24412606,
 199912706,1637069691,13405842666,109779463516,
 898976005896,7361648869421,60284005131851,
 493661316969811,4042556485091321,
 33104199931650186]