# A331352 (b-file synthesized from sequence entry) 1 0 2 6 3 405 4 7904 5 76880 6 486522 7 2300305 8 8806336 9 28725192 10 82626270 11 214744629 12 513368064 13 1144198952 14 2402617490 15 4792612545 16 9142333696 17 16768783408 18 29707141878 19 51023629173 20 85234690080 21 138859666848