# A000470 (b-file synthesized from sequence entry)
5 13
6 72
7 595
8 4096
9 39078
10 379760
11 4181826
12 49916448
13 647070333
14 9035216428
15 135236990388
16 2159812592384
17 36658601139066
18 658942295734944
19 12504663617290908
20 249823152134646144
21 5241223014084306270
22 115206851288747267148
23 2647678812396326064043