This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A075734 #3 Mar 31 2012 14:39:59 %S A075734 1,8,55,377,610,10946,17711,121393,3524578,5702887,9227465,39088169, %T A075734 63245986,1836311903,20365011074,139583862445,365435296162, %U A075734 591286729879,4052739537881,17167680177565,117669030460994 %N A075734 Fibonacci numbers F(k) when k is a product of an even number of distinct primes A030229 (mu(k)=1). %e A075734 14=2*7 and fibonacci(14)=377, 15=3*5 and fibonacci(15)=610,... %p A075734 with(combinat, fibonacci): fib_m1dsk := proc(n); if (numtheory[mobius](n)=1) then RETURN(fibonacci(n)); fi; end: seq((fib_m1dsk((i))), i=1..100); %Y A075734 Cf. A000045, A030229. %K A075734 easy,nonn %O A075734 1,2 %A A075734 _Jani Melik_, Oct 07 2002