URL: https://oeis.org/A027331/b027331.txt
# A027331 (b-file synthesized from sequence entry)
2 5
3 36
4 293
5 2374
6 19398
7 159072
8 1310669
9 10844525
10 90088935
11 751173656
12 6284938344
13 52752138077
14 444072874534
15 3748425872686
16 31720368301774
17 269056938823323
18 2287158222456938
19 19481849054942368
20 166260043774604820
21 1421400361753347588
22 12172156656845655429
