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A218665 Numbers n such that n divides sum of first n numbers from Flavius Josephus's sieve (A099074). 0
1, 2, 4, 10, 16, 20, 41, 44, 55, 67, 76, 548, 751, 1962, 3318, 3760, 5873, 7729, 8074, 15502, 33847, 65888, 89836, 167786, 512688, 1401686, 2520988, 2897654, 5552333, 6352323, 7981750 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

a(32) > 10^7.

LINKS

Table of n, a(n) for n=1..31.

EXAMPLE

The sum of the first 20 terms of A000960 = 2240 which is divisible by 20.

PROG

(PARI) s=1; print1(1 ", "); for(n=2, 10^4, f=n^2; forstep(m=n-1, 2, -1, r=f%m; if(r==0, r=m); f=f-r); f--; s=s+f; if(s%n==0, print1(n ", ")))

CROSSREFS

Cf. A000960.

Sequence in context: A125245 A096689 A039682 * A189558 A111149 A123689

Adjacent sequences:  A218662 A218663 A218664 * A218666 A218667 A218668

KEYWORD

nonn,more

AUTHOR

Donovan Johnson, Nov 04 2012

STATUS

approved

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Last modified August 24 05:48 EDT 2017. Contains 291052 sequences.