# A081684 (b-file synthesized from sequence entry) 0 1 1 -1 2 -1 3 29 4 275 5 1829 6 10739 7 59429 8 318275 9 1670789 10 8656979 11 44454629 12 226827875 13 1151991749 14 5830280819 15 29429454629 16 148249811075 17 745630312709 18 3745590106259 19 18797445635429 20 94264432179875 21 472428649241669 22 2366562219717299 23 11850466059333029 24 59322887352366275 25 296896476647946629