[seqfan] A089068 and A180667 duplicates?

Richard Mathar mathar at strw.leidenuniv.nl
Wed Sep 22 14:47:54 CEST 2010


Comparing

http://oeis.org/classic/?q=id:A180667|id:A089068
0,0,1,3,6,12,23,43,80,148,273,503,926,1704,3135,5767,10608,19512,35889,66011,121414,223316,410743,755475,1389536,2555756,4700769,8646063,15902590,29249424,53798079,98950095,181997600,
0,1,3,6,12,23,43,80,148,273,503,926,1704,3135,5767,10608,19512,35889,66011,121414,223316,410743,755475,1389536,2555756,4700769,8646063,15902590,29249424,53798079,98950095,181997600,334745776,615693473,

there is a comment in A180667 which says "For larger values of n the two sequences diverge. "
How can this happen given that the two g.f.'s are the same?

Richard Mathar




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