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A047489 Numbers that are congruent to {1, 2, 3, 5, 7} mod 8. 2
1, 2, 3, 5, 7, 9, 10, 11, 13, 15, 17, 18, 19, 21, 23, 25, 26, 27, 29, 31, 33, 34, 35, 37, 39, 41, 42, 43, 45, 47, 49, 50, 51, 53, 55, 57, 58, 59, 61, 63, 65, 66, 67, 69, 71, 73, 74, 75, 77, 79, 81, 82, 83, 85, 87, 89 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Numbers n such that A002817(n) is divisible by n. [Bruno Berselli, Dec 11 2013]

LINKS

Bruno Berselli, Table of n, a(n) for n = 1..1000

Index entries for linear recurrences with constant coefficients, signature (1,0,0,0,1,-1).

FORMULA

G.f.: x*(x+1)*(x^4+x^3+x^2+1)/((x-1)^2*(x^4+x^3+x^2+x+1)). [Colin Barker, Jun 22 2012]

CROSSREFS

Cf. A002817.

Sequence in context: A325600 A195921 A175089 * A196499 A035061 A302403

Adjacent sequences: A047486 A047487 A047488 * A047490 A047491 A047492

KEYWORD

nonn,easy

AUTHOR

N. J. A. Sloane

STATUS

approved

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Last modified February 7 09:58 EST 2023. Contains 360115 sequences. (Running on oeis4.)