# A081922 (b-file synthesized from sequence entry) 0 1 1 4 2 17 3 76 4 361 5 1844 6 10321 7 64348 8 453329 9 3619684 10 32666161 11 329434604 12 3677682937 13 44901581716 14 595567550321 15 8505627039484 16 130307878338721 17 2126927187154628 18 36912563369550289 19 677277819029706124