# A047664 (b-file synthesized from sequence entry) 1 7 2 56 3 287 4 1120 5 3591 6 9912 7 24319 8 54272 9 112071 10 216952 11 397727 12 696032 13 1170247 14 1900152 15 2992383 16 4586752 17 6863495 18 10051512 19 14437663 20 20377184 21 28305287 22 38750008 23 52346367 24 69851904 25 92163655 26 120336632 27 155603871