# A055890 (b-file synthesized from sequence entry) 0 1 1 1 2 3 3 6 4 14 5 28 6 68 7 148 8 358 9 845 10 2061 11 5018 12 12458 13 30922 14 77557 15 195154 16 493809 17 1253614 18 3195210 19 8166758 20 20935826 21 53799072 22 138571332 23 357647566 24 924846881 25 2395702829 26 6215779536 27 16150985916 28 42024260088 29 109485000778