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A339598 Numbers k such that k | Sum_{i=1..k} A000045(i) and k+1 | Sum_{i=1..k+1} A000045(i). 0
1, 6479, 11663, 51983, 196559 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
a(1)-a(5) are given on p. 11 in Yaqubi, Fatehizadeh, 2020. According to the authors there are no other terms up to 10^6.
Apparently an erroneous version of A331977.
Included in accordance with OEIS policy of including published but erroneous sequences to serve as pointers to the correct values.
LINKS
D. Yaqubi and A. Fatehizadeh, Some results on average of Fibonacci and Lucas sequences, arXiv:2001.11839 [math.CO], 2020.
PROG
(PARI) is(n) = my(s=sum(i=1, n, fibonacci(i))); lift(Mod(s, n))==0 && lift(Mod(s+fibonacci(n+1), n+1))==0
CROSSREFS
Sequence in context: A213117 A232410 A331977 * A175756 A190012 A362878
KEYWORD
nonn,hard,more
AUTHOR
Felix Fröhlich, Dec 09 2020
STATUS
approved

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Last modified May 24 01:38 EDT 2024. Contains 372768 sequences. (Running on oeis4.)