A229399 - OEIS

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A229399 as a simple table

n	a(n)
1	16
2	89
3	536
4	3357
5	21464
6	138645
7	899860
8	5852687
9	38099072
10	248105251
11	1615963560
12	10525963187
13	68565944112
14	446645329321
15	2909516286464
16	18953111619005
17	123464205731360
18	804270242627253
19	5239177554585924

[16,89,536,3357,21464,138645,899860,5852687, 38099072,248105251,1615963560,10525963187, 68565944112,446645329321,2909516286464, 18953111619005,123464205731360,804270242627253, 5239177554585924]