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A306544 as a simple table

na(n)
12
22
314
44
52
614
7126
88
91022
102
116
1228
13126
14126
1514
1616
17131070
181022
19524286
204
21126
226
238388606
2456
254
26126
27268435454
28252
29536870910
3014
3165534
3232
33126
34131070
35126
362044
3714
38524286
39126
408
4162
42126
434194302
4412
451022
468388606
47140737488355326
48112
498796093022206

[2,2,14,4,2,14,126,8,1022,2,6,28,126,126,14,16,
 131070,1022,524286,4,126,6,8388606,56,4,126,
 268435454,252,536870910,14,65534,32,126,131070,
 126,2044,14,524286,126,8,62,126,4194302,12,1022,
 8388606,140737488355326,112,8796093022206]