URL: https://oeis.org/A258581/b258581.txt
# A258581 (b-file synthesized from sequence entry)
1 2
2 3
3 2
4 5
5 2
6 3
7 23
8 37
9 17
10 149
11 761
12 50647
13 4799
14 411527
15 18871308021859
16 10312625105789
17 17838863896549
18 57892815889963361050999657943
19 2252973546284243766517
20 1849093263449444009859625443689931115519009693
