A199251 - OEIS

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A199251 as a simple table

n	a(n)
1	1
2	14
3	114
4	447
5	16898
6	311216
7	2913528
8	11312517
9	551973865
10	11307744507
11	111458340272
12	438326135133
13	23492069994614
14	506092203408916
15	5117349646825383
16	20296888647373122
17	1141664017876511539

[1,14,114,447,16898,311216,2913528,11312517, 551973865,11307744507,111458340272,438326135133, 23492069994614,506092203408916,5117349646825383, 20296888647373122,1141664017876511539]