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A326422 Numbers k such that A000045(k) mod 5 is prime. 0
3, 4, 6, 7, 13, 14, 16, 17, 23, 24, 26, 27, 33, 34, 36, 37, 43, 44, 46, 47, 53, 54, 56, 57, 63, 64, 66, 67, 73, 74, 76, 77, 83, 84, 86, 87, 93, 94, 96, 97, 103, 104, 106, 107, 113, 114, 116, 117, 123, 124, 126, 127, 133, 134, 136, 137, 143, 144, 146, 147, 153, 154, 156, 157 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Position of prime numbers in A082116.

LINKS

Table of n, a(n) for n=1..64.

FORMULA

G.f.: x*(3*x^2+4*x+3)*(x^2-x+1)/((x+1)*(x^2+1)*(x-1)^2). - Alois P. Heinz, Jul 08 2019

MATHEMATICA

Select[Range[160], MemberQ[{2, 3}, Mod[Fibonacci[#], 5]] &]

PROG

(MAGMA) [n: n in [0..200] | IsPrime(Fibonacci(n) mod 5)];

CROSSREFS

Cf. A000045, A082116.

Partial sums of A010123.

Sequence in context: A290432 A276783 A288731 * A093707 A058639 A253888

Adjacent sequences:  A326419 A326420 A326421 * A326423 A326424 A326425

KEYWORD

nonn,easy

AUTHOR

Vincenzo Librandi, Jul 06 2019

STATUS

approved

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Last modified April 4 04:02 EDT 2020. Contains 333212 sequences. (Running on oeis4.)