# A244746 (b-file synthesized from sequence entry) 0 1 1 1 2 4 3 25 4 116 5 164 6 194 7 16481 8 11690 9 1664364 10 136498136 11 2564496436 12 4064014 13 491648100 14 436491616160 15 81368116641625 16 9259254936490 17 148136161649810 18 164949369644900 19 149364943691810 20 362536161401640 21 41616363643649040 22 811166442536936160