# A199330 (b-file synthesized from sequence entry) 0 0 1 1 2 484 3 1156 4 2116 5 4900 6 16900 7 30625 8 41209 9 765625 10 12027024 11 45346756 12 94303521 13 1188939361 14 2144430864 15 3475809936 16 6168531600 17 26159180644 18 211618400400 19 483560298225