# A069124 (b-file synthesized from sequence entry) 1 1 2 2 3 3 4 10 5 12 6 32 7 42 8 268 9 288 10 656 11 924 12 4360 13 3816 14 11336 15 13536 16 195472 17 200832 18 423104 19 618576 20 2404960 21 2506464 22 6994784 23 8820864 24 85524160 25 60669696 26 145981952 27 194348448 28 1073479840