# A026663 (b-file synthesized from sequence entry) 1 1 2 4 3 13 4 59 5 205 6 973 7 3479 8 16882 9 61319 10 301486 11 1105973 12 5485128 13 20259303 14 101097960 15 375265833 16 1881279267 17 7009601253 18 35265787861 19 131791097063 20 664934132269 21 2490886179629 22 12596544495403 23 47280882141059 24 239562157252595