# A150105 (b-file synthesized from sequence entry) 0 1 1 2 2 6 3 19 4 69 5 239 6 888 7 3283 8 12323 9 46434 10 177690 11 675990 12 2602449 13 10024005 14 38728070 15 149933270 16 582864650 17 2263804898 18 8824622593 19 34428415653 20 134461239120 21 525789194496 22 2059338838290 23 8065991665054 24 31641263512192 25 124204017286748 26 487810345489419 27 1917359731005276