Fibonacci-Zumkeller numbers: a(n)=n if n<=3, otherwise the smallest number >= a(n-2) + a(n-1) having at least one common factor with a(n-2), but none with a(n-1).
A249357
Fibonacci-Zumkeller numbers: a(n)=n if n<=3, otherwise the smallest number >= a(n-2) + a(n-1) having at least one common factor with a(n-2), but none with a(n-1).
Terms
- a(0) =1a(1) =2a(2) =3a(3) =8a(4) =15a(5) =26a(6) =45a(7) =74a(8) =123a(9) =200a(10) =327a(11) =530a(12) =861a(13) =1396a(14) =2259a(15) =3656a(16) =5919a(17) =9578a(18) =15501a(19) =25082a(20) =40587a(21) =65672a(22) =106263a(23) =171938a(24) =278211a(25) =450151a(26) =728367a(27) =1178527a(28) =1906896a(29) =3085439
External references
- oeis: A249357