# A120421 (b-file synthesized from sequence entry) 1 1 2 2 3 3 4 6 5 10 6 20 7 36 8 72 9 135 10 272 11 528 12 1052 13 2080 14 4160 15 8244 16 16508 17 32896 18 65770 19 131328 20 262632 21 524744 22 1049600 23 2098176 24 4196200 25 8390620 26 16781312 27 33558291 28 67116944 29 134225920 30 268451240 31 536887296 32 1073774376 33 2147515424