# A023663 (b-file synthesized from sequence entry) 1 1 2 6 3 17 4 36 5 68 6 114 7 176 8 258 9 360 10 488 11 643 12 826 13 1045 14 1298 15 1588 16 1920 17 2292 18 2712 19 3180 20 3696 21 4269 22 4894 23 5579 24 6326 25 7133 26 8012 27 8958 28 9974 29 11068 30 12234 31 13483 32 14814 33 16225 34 17732 35 19325 36 21010 37 22794 38 24670 39 26652 40 28736 41 30921