# A012752 (b-file synthesized from sequence entry) 0 1 1 2 2 16 3 398 4 18072 5 1465962 6 169054092 7 28688618814 8 6235376638608 9 1810793539845714 10 636329871517885332 11 282006422882452989030 12 145933818284739352119000 13 91644646853849910546846330