# A243694 (b-file synthesized from sequence entry)
0 1
1 1
2 6
3 45
4 382
5 3498
6 33696
7 336549
8 3453750
9 36197694
10 385817700
11 4169274354
12 45573898860
13 503014992340
14 5598239469972
15 62754598454805
16 707899472049702
17 8029846915852662
18 91534356644739300
19 1048036064453687814
20 12047350849047152388
21 138984261578842304268