A010727 - OEIS

A010727

Constant sequence: the all 7's sequence.

7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7

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OFFSET

0,1

COMMENTS

a(n) = A153466(n) mod 9. - Paul Curtz, Dec 27 2008

Continued fraction expansion of A176439. - Bruno Berselli, Mar 15 2011

Final digit of 16^(2^n) + 1. That is, the last digit of every Fermat number F(n) is 7, where n >= 2. - Arkadiusz Wesolowski, Jul 28 2011

Decimal expansion of 7/9. - Arkadiusz Wesolowski, Sep 12 2011

LINKS

Table of n, a(n) for n=0..80.

Tanya Khovanova, Recursive Sequences

INRIA Algorithms Project, Encyclopedia of Combinatorial Structures 1015

Christian Perfect, Integer sequence reviews on Numberphile (or vice versa), 2013.

Index to divisibility sequences

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

FORMULA

G.f.: 7/(1-x). - Bruno Berselli, Mar 15 2011

a(n) = 7. - Arkadiusz Wesolowski, Sep 12 2011

E.g.f.: 7*e^x. - Vincenzo Librandi, Jan 28 2012

MATHEMATICA

ContinuedFraction[(7 + Sqrt@ 53)/2, 105] (* Or *)

CoefficientList[ Series[7/(1 - x), {x, 0, 104}], x] (* Robert G. Wilson v *)

PadRight[{}, 90, 7] (* or *) Table[7, {90}] (* Harvey P. Dale, Jun 05 2013 *)

PROG

(PARI) a(n)=7 \\ Charles R Greathouse IV, Sep 24 2015

CROSSREFS

Cf. A000012 (the all 1's sequence), A153466, A176439.

Sequence in context: A112114 A031182 A106705 * A186684 A255910 A108689

Adjacent sequences: A010724 A010725 A010726 * A010728 A010729 A010730

KEYWORD

nonn,easy

AUTHOR

N. J. A. Sloane

STATUS

approved