# A026130 (b-file synthesized from sequence entry) 0 1 1 3 2 29 3 286 4 2954 5 31331 6 338237 7 3697641 8 40803750 9 453553098 10 5070709436 11 56958466285 12 642318632219 13 7267415064770 14 82459118104869 15 937909185029935 16 10690839598092195 17 122090330159822364 18 1396616783648701671 19 16000093859781395335 20 183548792680080355470