# A138803 (b-file synthesized from sequence entry) 1 0 2 1 3 3 4 8 5 20 6 47 7 105 8 224 9 456 10 881 11 1595 12 2632 13 3692 14 3359 15 -2927 16 -27776 17 -103088 18 -304607 19 -803149 20 -1966392 21 -4549884 22 -10029361 23 -21114759 24 -42375200 25 -80491880 26 -142437359 27 -226667157 28 -294543992 29 -191015460 30 556551487 31 3216934945