# A177960 (b-file synthesized from sequence entry) 1 3 2 5 3 17 4 51 5 257 6 1285 7 3855 8 13107 9 65537 10 196611 11 983055 12 1114129 13 5570645 14 16711935 15 50529027 16 84215045 17 858993459 18 4294967297 19 21474836485 20 219043332147 21 365072220245 22 1103806595329 23 3311419785987