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A047326 Numbers that are congruent to {0, 1, 2, 5, 6} mod 7. 0
0, 1, 2, 5, 6, 7, 8, 9, 12, 13, 14, 15, 16, 19, 20, 21, 22, 23, 26, 27, 28, 29, 30, 33, 34, 35, 36, 37, 40, 41, 42, 43, 44, 47, 48, 49, 50, 51, 54, 55, 56, 57, 58, 61, 62, 63, 64, 65, 68, 69, 70, 71, 72, 75, 76, 77, 78 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

LINKS

Table of n, a(n) for n=1..57.

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

FORMULA

G.f.: x^2*(1 + x + 3*x^2 + x^3 + x^4) / ( (1 + x + x^2 + x^3 + x^4)*(x-1)^2 ). - R. J. Mathar, Dec 04 2011

MATHEMATICA

DeleteCases[Range[0, 100], _?(MemberQ[{3, 4}, Mod[#, 7]]&)] (* or *) LinearRecurrence[ {1, 0, 0, 0, 1, -1}, {0, 1, 2, 5, 6, 7}, 90] (* Harvey P. Dale, Aug 06 2018 *)

CROSSREFS

Sequence in context: A228090 A287440 A111175 * A039044 A212441 A182783

Adjacent sequences:  A047323 A047324 A047325 * A047327 A047328 A047329

KEYWORD

nonn

AUTHOR

N. J. A. Sloane

STATUS

approved

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Last modified September 26 15:47 EDT 2021. Contains 347668 sequences. (Running on oeis4.)