login

A188494 as a simple table

na(n)
00
11
22
34
412
542
6138
7414
81235
93764
1011604
1135664
12109132
13333652
141021220
153127709
169578526
1729326904
1889785684
19274896606
20841682902
212577075290
227890425175
2324158602552
2473968049928
25226473538032
26693411153800
272123068036904
286500352097064

[0,1,2,4,12,42,138,414,1235,3764,11604,35664,
 109132,333652,1021220,3127709,9578526,29326904,
 89785684,274896606,841682902,2577075290,
 7890425175,24158602552,73968049928,226473538032,
 693411153800,2123068036904,6500352097064]