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A156616 as a simple table

na(n)
01
12
26
316
438
588
6196
7420
8878
91794
103584
117032
1213572
1325792
1448352
1589512
16163774
17296444
18531234
19943072
201659560
212896376
225015700
238622108
2414718652
2524960138
2642062200
2770458160
28117349856
29194381704
30320295312
31525123604

[1,2,6,16,38,88,196,420,878,1794,3584,7032,13572,
 25792,48352,89512,163774,296444,531234,943072,
 1659560,2896376,5015700,8622108,14718652,24960138,
 42062200,70458160,117349856,194381704,320295312,
 525123604]