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A221997 as a simple table

na(n)
12
23
34
47
511
616
727
843
965
10108
11172
12268
13436
14695
151101
161770
172819
184487
197188
2011453
2118271
2229212
2346578
2474346
25118763
26189459
27302472
28482960
29770686
301230388
311964230
323135006
335004771
347989192
3512752257
3620357209
3732495805

[2,3,4,7,11,16,27,43,65,108,172,268,436,695,1101,
 1770,2819,4487,7188,11453,18271,29212,46578,74346,
 118763,189459,302472,482960,770686,1230388,
 1964230,3135006,5004771,7989192,12752257,20357209,
 32495805]