# A058480 (b-file synthesized from sequence entry) 0 0 1 0 2 1 3 8 4 78 5 944 6 13760 7 235248 8 4620224 9 102551296 10 2539240416 11 69398978560 12 2075328010624 13 67408188246528 14 2363279141726464 15 88952164594807808 16 3577709564478865920 17 153136329382704201728 18 6950244396227548178432