# A271495 (b-file synthesized from sequence entry) 0 1 1 70 2 668 3 14104 4 198640 5 3420256 6 53143488 7 864838016 8 13714054912 9 220102985216 10 3513567575040 11 56284226394112 12 900460612808704 13 14414430456537088 14 230619566685274112 15 3689872453256970240 16 59031392914560188416 17 944463240632040030208 18 15111217402853747064832