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Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).

A195220 as a simple table

na(n)
11
21
37
41
519
691
71
837
91047
102277
111
1261
135453
14176471
15111031
161
1791
1818903
193395245
2092031109
2110654607
221
23127
2451205
2531640829
269032683465
27149824887097
282021888119
291
30169
31117585
32189677411
33289301569283
34103565705397639

[1,1,7,1,19,91,1,37,1047,2277,1,61,5453,176471,
 111031,1,91,18903,3395245,92031109,10654607,1,127,
 51205,31640829,9032683465,149824887097,2021888119,
 1,169,117585,189677411,289301569283,
 103565705397639]