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A153889
Middle of five consecutive Fibonacci numbers such that sum of five consecutive Fibonacci numbers is prime number.
3
1, 3, 5, 21, 233, 377, 6765, 317811, 514229, 2178309, 53316291173, 10610209857723, 23416728348467685, 259695496911122585, 7540113804746346429, 36726740705505779255899443, 251728825683549488150424261, 37281903592600898879479448409585328515842582885579275203077366912825
OFFSET
1,2
COMMENTS
0+1+1+2=3=7, 1+2+3+5+8=19, 2+3+5+8=13=31, 8+13+21+34+55=131, 89+144+233+377+610=1453, 144+233+377+610+987=2351,...
MATHEMATICA
a=0; b=1; c=1; d=2; lst={}; Do[e=Fibonacci[n]; p=a+b+c+d+e; If[PrimeQ[p], AppendTo[lst, c]]; a=b; b=c; c=d; d=e, {n, 4, 6!}]; lst
KEYWORD
nonn
AUTHOR
STATUS
approved