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A187151 as a simple table

na(n)
01
12
28
326
4108
5382
61586
75812
824044
989846
10370398
111401292
125759826
1321977516
1490111820
15345994216
161415691244
175461770406
1822308412934
1986392108636
20352334866238
211368640564996
225574504569620
2321708901408216
2488320660937298
25344680279929532
261400902293406676

[1,2,8,26,108,382,1586,5812,24044,89846,370398,
 1401292,5759826,21977516,90111820,345994216,
 1415691244,5461770406,22308412934,86392108636,
 352334866238,1368640564996,5574504569620,
 21708901408216,88320660937298,344680279929532,
 1400902293406676]