# A024529 (b-file synthesized from sequence entry) 1 1 2 1 3 5 4 19 5 163 6 1583 7 22889 8 359083 9 7333087 10 158961311 11 4832970889 12 143352404329 13 5504599450303 14 218267839327613 15 9689767354614569 16 442336304335214713 17 24058713912354871199 18 1386874962351747356011