# A074108 (b-file synthesized from sequence entry)
0 2
1 4
2 6
3 8
4 13585
5 81504
6 959339
7 3715372
8 78137091
9 2037878170
10 861472331456
11 35628332614704
12 2509243979641006
13 97463093398309010
14 52748900893862397840
15 7355609995400651988940
16 1755796374216684779591144
17 71520859355651043708177774