login
This site is supported by donations to The OEIS Foundation.

 

Logo

The OEIS is looking to hire part-time people to help edit core sequences, upload scanned documents, process citations, fix broken links, etc. - Neil Sloane, njasloane@gmail.com

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A032796 Numbers that are congruent to {1, 2, 3, 5, 6} mod 7. 1
1, 2, 3, 5, 6, 8, 9, 10, 12, 13, 15, 16, 17, 19, 20, 22, 23, 24, 26, 27, 29, 30, 31, 33, 34, 36, 37, 38, 40, 41, 43, 44, 45, 47, 48, 50, 51, 52, 54, 55, 57, 58, 59, 61, 62, 64, 65, 66, 68, 69, 71, 72, 73, 75, 76, 78, 79, 80, 82, 83, 85, 86, 87, 89, 90, 92, 93, 94, 96, 97, 99 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

n(n+1)(n+2)...(n+6) / n+(n+1)+(n+2)+...+(n+6) is a multiple of n.

LINKS

Table of n, a(n) for n=1..71.

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

FORMULA

Equals natural numbers minus '4, 7, 11, 14, 18, ...' (= previous term +3, +4, +3, +4, ...).

G.f.: x(x^5+x^4+2x^3+x^2+x+1)/[(1-x)(1-x^5)].

PROG

(MAGMA)[ n: n in [0..120] | n mod 7 in {1, 2, 3, 5, 6} ]; [From Vincenzo Librandi, Dec 29 2010]

CROSSREFS

Cf. A032765-A032798.

Sequence in context: A247431 A039033 A047333 * A087057 A184580 A184622

Adjacent sequences:  A032793 A032794 A032795 * A032797 A032798 A032799

KEYWORD

nonn

AUTHOR

Patrick De Geest, May 15 1998

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent | More pages
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy .

Last modified May 26 05:25 EDT 2017. Contains 287077 sequences.