# A176471 (b-file synthesized from sequence entry) 1 1 2 4 3 16 4 36 5 144 6 576 7 900 8 3600 9 14400 10 32400 11 44100 12 129600 13 176400 14 705600 15 1587600 16 2822400 17 6350400 18 21344400 19 57153600 20 85377600 21 192099600 22 341510400 23 768398400 24 3073593600 25 6915585600 26 12294374400 27 14428814400 28 32464832400 29 57715257600 30 129859329600