Fibonacci numbers F(k) for k not squarefree (A013929).

Terms

a(0) =3a(1) =21a(2) =34a(3) =144a(4) =987a(5) =2584a(6) =6765a(7) =46368a(8) =75025a(9) =196418a(10) =317811a(11) =2178309a(12) =14930352a(13) =102334155a(14) =701408733a(15) =1134903170a(16) =4807526976a(17) =7778742049a(18) =12586269025a(19) =32951280099a(20) =86267571272a(21) =225851433717