A030896 - OEIS

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A030896 as a simple table

n	a(n)
1	1
2	2
3	7
4	30
5	151
6	911
7	6377
8	51016
9	459145
10	4591451
11	50505962
12	606071554
13	7878930204
14	110305022865
15	1654575342979
16	26473205487672
17	450044493290434
18	8100800879227824
19	153915216705328658
20	3078304334106573166

[1,2,7,30,151,911,6377,51016,459145,4591451, 50505962,606071554,7878930204,110305022865, 1654575342979,26473205487672,450044493290434, 8100800879227824,153915216705328658, 3078304334106573166]