# A090636 (b-file synthesized from sequence entry) 1 15 2 8 3 12 4 16 5 32 6 80 7 176 8 368 9 752 10 1520 11 3424 12 8592 13 20096 14 70464 15 235072 16 705280 17 3023616 18 13223680 19 55540736 20 278539264 21 1392697344 22 9541095424 23 58609614848 24 410267320320 25 3397142953984 26 24143851798528 27 176071227916288 28 1232666139967488