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A047663 as a simple table

na(n)
16
242
3188
4644
51826
64494
79912
820040
937758
1067122
11113652
12184652
13289562
14440342
15651888
16942480
171334262
181853754
192532396
203407124
214520978
225923742
237672616
249832920
2512478830
2615694146
2719573092
2824221148
2929755914
3036308006

[6,42,188,644,1826,4494,9912,20040,37758,67122,
 113652,184652,289562,440342,651888,942480,1334262,
 1853754,2532396,3407124,4520978,5923742,7672616,
 9832920,12478830,15694146,19573092,24221148,
 29755914,36308006]