# A126375 (b-file synthesized from sequence entry) 0 1 1 21 2 61 3 179 4 527 5 1555 6 4595 7 13593 8 40245 9 119235 10 353459 11 1048285 12 3110249 13 9231305 14 27407185 15 81392387 16 241773327 17 718335747 18 2134675683 19 6344739309 20 18861068265 21 56076828573 22 166747755621 23 495896780609 24 1474935978225