# A147978 (b-file synthesized from sequence entry) 1 -5 2 -14 3 -42 4 -98 5 126 6 4606 7 50478 8 446782 9 3622206 10 28040446 11 211134798 12 1561328062 13 11403051486 14 82538901886 15 593482158318 16 4245770823742 17 30254894691966 18 214923605948926 19 1522969836817038 20 10770185918341822