# A292878 (b-file synthesized from sequence entry) 0 1 1 5 2 21 3 81 4 313 5 1213 6 4701 7 18217 8 70593 9 273557 10 1060069 11 4107905 12 15918665 13 61686893 14 239044717 15 926329305 16 3589646289 17 13910345285 18 53904393461 19 208886521137 20 809462381657 21 3136771792413 22 12155397830269 23 47103744291977 24 182533122922465 25 707339543058421 26 2741032537895173 27 10621856854367201