# A011835 (b-file synthesized from sequence entry) 1 1 2 2 3 7 4 43 5 471 6 9705 7 398663 8 34221167 9 6366566540 10 2641102182925 11 2498210880028303 12 5484438524509076715 13 28346990140510757039949 14 349039307360779249087131805 15 10340590252034005587340296182702