# A276691 (b-file synthesized from sequence entry) 1 1 2 4 3 11 4 27 5 63 6 142 7 314 8 684 9 1474 10 3150 11 6685 12 14110 13 29640 14 62022 15 129337 16 268930 17 557752 18 1154164 19 2383587 20 4913835 21 10113983 22 20787252 23 42668775 24 87479539 25 179157497 26 366547820 27 749256450 28 1530251194 29 3122882776 30 6368433118 31 12978230568 32 26431617730 33 53799078716 34 109442256914 35 222519713892 36 452208698216 37 918560947022 38 1865036287632 39 3785181059505 40 7679199158098