Numbers k such that tau(k) and sigma(k) are both Fibonacci numbers.

Terms

a(0) =1a(1) =2a(2) =7a(3) =9a(4) =66a(5) =70a(6) =23178a(7) =27034a(8) =28678a(9) =28965a(10) =29578a(11) =30094a(12) =32253a(13) =32793a(14) =34113a(15) =35365a(16) =39319a(17) =40963a(18) =8294630a(19) =9124082a(20) =9400558a(21) =9943282a(22) =9943558a(23) =11178399a(24) =12420355a(25) =13550867a(26) =13892383a(27) =14035183a(28) =14068027a(29) =14391187