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A280728 Number of even divisors of Lucas(n). 1
1, 0, 0, 2, 0, 0, 3, 0, 0, 4, 0, 0, 4, 0, 0, 8, 0, 0, 8, 0, 0, 8, 0, 0, 4, 0, 0, 8, 0, 0, 12, 0, 0, 8, 0, 0, 8, 0, 0, 16, 0, 0, 24, 0, 0, 64, 0, 0, 8, 0, 0, 16, 0, 0, 20, 0, 0, 16, 0, 0, 32, 0, 0, 64, 0, 0, 24, 0, 0, 32, 0, 0, 8, 0, 0, 128, 0, 0, 12, 0, 0 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,4

LINKS

Amiram Eldar, Table of n, a(n) for n = 0..1000

FORMULA

a(n) = A183063(A000032(n)).

MATHEMATICA

a[n_]:=Block[{d=Divisors[LucasL[n]]}, Count[EvenQ[d], True]]; Table[a[n], {n, 0, 80}]

CROSSREFS

Cf. A000032, A183063, A193495.

Sequence in context: A049597 A210951 A233440 * A175676 A035377 A136274

Adjacent sequences:  A280725 A280726 A280727 * A280729 A280730 A280731

KEYWORD

nonn

AUTHOR

Vincenzo Librandi, Jan 09 2017

EXTENSIONS

Offset corrected by Amiram Eldar, Sep 03 2019

STATUS

approved

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Last modified June 15 15:16 EDT 2021. Contains 345049 sequences. (Running on oeis4.)