I also like the AT&T OEIS: http://www.research.att.com/ http://www.research.att.com/ http://www.research.att.com/~njas/sequences/A114574 http://www.research.a

I also like the AT&T OEIS: http://www.research.att.com/ http://www.research.att.com/ http://www.research.att.com/~njas/sequences/A114574 http://www.research.att.com/~njas/sequences/A114574 -- a good one :)