# A069257 (b-file synthesized from sequence entry)
2 6
3 20
4 57960
5 3145940416080
6 5765760
7 288680192354725622464710969631440008928
8 20484953806009937929429725901717124022833778640
9 59553628273094395440
10 102119994931499628863688098762720537989600