# A074988 (b-file synthesized from sequence entry) 1 1 2 3 3 7 4 14 5 29 6 59 7 119 8 238 9 476 10 953 11 1907 12 3814 13 7629 14 15259 15 30519 16 61038 17 122077 18 244154 19 488309 20 976618 21 1953237 22 3906475 23 7812951 24 15625902 25 31251804 26 62503609 27 125007218 28 250014436 29 500028873 30 1000057747 31 2000115495