# A341045 (b-file synthesized from sequence entry) 1 1 2 4 3 6 4 28 5 45 6 120 7 496 8 672 9 6048 10 8128 11 14421 12 30240 13 32760 14 523776 15 2178540 16 23569920 17 26409026 18 29270772 19 30685402 20 33550336 21 45532800