# A126394 (b-file synthesized from sequence entry) 0 1 1 7 2 29 3 125 4 543 5 2363 6 10287 7 44787 8 194995 9 848979 10 3696331 11 16093291 12 70067867 13 305065387 14 1328210699 15 5782837835 16 25177641963 17 109619822123 18 477268896747 19 2077959947307 20 9047137938475 21 39389933855019