# A080876 (b-file synthesized from sequence entry) 0 1 1 1 2 1 3 2 4 4 5 12 6 28 7 88 8 208 9 656 10 1552 11 4896 12 11584 13 36544 14 86464 15 272768 16 645376 17 2035968 18 4817152 19 15196672 20 35955712 21 113429504 22 268377088 23 846649344 24 2003193856 25 6319476736 26 14952042496 27 47169216512 28 111603564544