# A136671 (b-file synthesized from sequence entry) 1 0 2 1 3 2 4 4 5 8 6 17 7 37 8 81 9 177 10 388 11 850 12 1864 13 4088 14 8966 15 19664 16 43128 17 94591 18 207464 19 455026 20 997999 21 2188891