# A151372 (b-file synthesized from sequence entry) 0 1 1 0 2 3 3 4 4 26 5 80 6 387 7 1596 8 7518 9 34656 10 167310 11 813384 12 4040212 13 20285408 14 103195235 15 530042604 16 2748206006 17 14362312640 18 75609109594 19 400620871608 20 2135307326508 21 11442213676512 22 61615122713550 23 333282537518040 24 1810222600024044 25 9869776566646080 26 54002852920884540 27 296449512451881360