# A147176 (b-file synthesized from sequence entry) 1 1 2 1 3 1 4 1 5 1 6 1 7 1 8 5 9 25 10 49 11 81 12 173 13 659 14 1949 15 6591 16 26979 17 151047 18 720521 19 4123761 20 21126009 21 143739573