# A274627 (b-file synthesized from sequence entry) 0 0 1 0 2 0 3 0 4 1 5 3 6 9 7 27 8 81 9 189 10 441 11 1029 12 2401 13 5145 14 11025 15 23625 16 50625 17 104625 18 216225 19 446865 20 923521 21 1876833 22 3814209 23 7751457 24 15752961 25 31755969 26 64016001 27 129048129 28 260144641 29 522337665 30 1048788225 31 2105834625 32 4228250625 33 8473082625 34 16979393025 35 34025371905 36 68184176641