login

A111881 as a simple table

na(n)
31
41
529
61
7103
8253
91669
10181
1130791
12849
13452993
1441003
1594949
16421117
1718358463
18446801
19124184839
2030064511
2180932487
2219812817
23211524139
24333707681
254757207109
262557825027
27105920383973
2814417396537
294649180818987

[1,1,29,1,103,253,1669,181,30791,849,452993,41003,
 94949,421117,18358463,446801,124184839,30064511,
 80932487,19812817,211524139,333707681,4757207109,
 2557825027,105920383973,14417396537,4649180818987]