# A075736 (b-file synthesized from sequence entry) 1 1 2 2 3 5 4 13 5 89 6 233 7 1597 8 4181 9 28657 10 514229 11 832040 12 1346269 13 24157817 14 165580141 15 267914296 16 433494437 17 2971215073 18 53316291173 19 956722026041 20 2504730781961 21 27777890035288 22 44945570212853 23 190392490709135