# A000450 (b-file synthesized from sequence entry) 4 1 5 10 6 50 7 385 8 3130 9 28764 10 291900 11 3249210 12 39367395 13 515874470 14 7270929806 15 109691447395 16 1763782644020 17 30114243100760 18 544123405603800 19 10373304279494964 20 208092476689208805 21 4381794437494059810 22 96635643877147885450 23 2227562535558247510885