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A047380 Numbers that are congruent to {1, 2, 4, 5} mod 7. 5
1, 2, 4, 5, 8, 9, 11, 12, 15, 16, 18, 19, 22, 23, 25, 26, 29, 30, 32, 33, 36, 37, 39, 40, 43, 44, 46, 47, 50, 51, 53, 54, 57, 58, 60, 61, 64, 65, 67, 68, 71, 72, 74, 75, 78, 79, 81, 82, 85, 86, 88, 89, 92, 93, 95, 96 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..56.

Index to sequences with linear recurrences with constant coefficients, signature (1,0,0,1,-1).

FORMULA

a(n)=(1/4)*{6*(n mod 4)+[(n+1) mod 4]+[(n+2) mod 4]} + 7*A002265 - Paolo P. Lava, Nov 05 2007

G.f. x*(1+x+2*x^2+x^3+2*x^4) / ( (1+x)*(x^2+1)*(x-1)^2 ). - R. J. Mathar, Oct 08 2011

CROSSREFS

Sequence in context: A038558 A027883 A201818 * A117121 A101925 A101884

Adjacent sequences:  A047377 A047378 A047379 * A047381 A047382 A047383

KEYWORD

nonn

AUTHOR

N. J. A. Sloane.

STATUS

approved

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Last modified May 23 14:17 EDT 2013. Contains 225601 sequences.