# A125180 (b-file synthesized from sequence entry) 1 2 2 5 3 12 4 26 5 56 6 114 7 232 8 466 9 936 10 1878 11 3758 12 7522 13 15048 14 30098 15 60200 16 120406 17 240818 18 481638 19 963282 20 1926568 21 3853138 22 7706282 23 15412568 24 30825142 25 61650292 26 123300588 27 246601178 28 493202360 29 986404722 30 1972809448 31 3945618910