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A161599 as a simple table

na(n)
11
218
3305
45167
587534
61482911
725121953
8425590290
97209912977
10122142930319
112069219902446
1235054595411263
13593858902089025
1410060546740102162
15170435435679647729
162887341859813909231
1748914376181156809198
18828657053219851847135
1914038255528556324592097

[1,18,305,5167,87534,1482911,25121953,425590290,
 7209912977,122142930319,2069219902446,
 35054595411263,593858902089025,10060546740102162,
 170435435679647729,2887341859813909231,
 48914376181156809198,828657053219851847135,
 14038255528556324592097]