# A024290 (b-file synthesized from sequence entry)
0 0
1 1
2 8
3 256
4 17408
5 1910656
6 309060608
7 69341479936
8 20585851486208
9 7805361597546496
10 3678560956503031808
11 2108887897093614862336
12 1444987869648059585527808
13 1166088560957891800314413056