# A144056 (b-file synthesized from sequence entry) 1 1 2 2 3 3 4 11 5 31 6 171 7 719 8 5907 9 40576 10 574191 11 6118805 12 134458817 13 2328856652 14 81657178991 15 2239533631682 16 126154274091928 17 5530047112752039 18 494646201440552586 19 34629959352847199652 20 4953721399562434015229