[seqfan] A098550

[Frank Adams-Watters]

This sequence has what at first seems to be at most a marginally 
interesting graph: several straight lines. But when we look at a(n)/n:

https://oeis.org/plot2a?name1=A098550&name2=A000027&tform1=untransformed&tform2=untransformed&shift=0&radiop1=ratio&drawpoints=true

it gets more interesting. The lines do not have integral slope, as one 
would expect them to have. Any insights into what what is going on here?

Franklin T. Adams-Watters