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A171668
Fibonacci numbers sandwiched between two numbers having same number of divisors.
2
34, 55, 144, 10946, 46368, 196418, 9227465, 1134903170, 4052739537881, 117669030460994, 420196140727489673, 12200160415121876738, 3928413764606871165730, 22698374052006863956975682, 68330027629092351019822533679447, 13598018856492162040239554477268290
OFFSET
1,1
LINKS
MATHEMATICA
f[n_]:=Length[Divisors[n]]; lst={}; Do[fi=Fibonacci[n]; If[f[fi-1]==f[fi+1], AppendTo[lst, fi]], {n, 170}]; lst
KEYWORD
nonn
AUTHOR
EXTENSIONS
a(15)-a(16) from Amiram Eldar, Aug 08 2024
STATUS
approved