# A048023 (b-file synthesized from sequence entry) 1 0 2 0 3 0 4 0 5 0 6 0 7 0 8 0 9 0 10 0 11 28 12 36 13 45 14 180 15 220 16 264 17 660 18 780 19 910 20 2821 21 3465 22 4220 23 16940 24 21420 25 26775 26 94248 27 118104 28 146300 29 461700 30 574644 31 708477 32 2310000 33 2899380 34 3610540 35 12357532 36 15634300 37 19623175 38 66098175