# A134165 (b-file synthesized from sequence entry) 0 1 1 3 2 8 3 24 4 86 5 348 6 1478 7 6324 8 26846 9 112668 10 467798 11 1925124 12 7867406 13 31980588 14 129475718 15 522603924 16 2104600766 17 8461122108 18 33972973238 19 136278002724 20 546271650926