# A036365 (b-file synthesized from sequence entry) 3 0 4 2 5 6 6 17 7 49 8 135 9 361 10 951 11 2493 12 6497 13 16837 14 43498 15 112164 16 288741 17 742294 18 1906552 19 4893835 20 12555662 21 32201344 22 82566738 23 211675672 24 542621858 25 1390929877 26 3565435302 27 9139718572 28 23430209922 29 60069035611 30 154014868677