# A012768 (b-file synthesized from sequence entry) 0 1 1 1 2 1 3 2 4 5 5 20 6 85 7 16 8 -887 9 14096 10 145865 11 -887456 12 -14963507 13 126998976 14 2554796829 15 -21834514688 16 -556819358703 17 5067177011456 18 157094249035537 19 -1485621376751104 20 -55286734778859115