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

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A021444 Decimal expansion of 1/440. 2
0, 0, 2, 2, 7, 2, 7, 2, 7, 2, 7, 2, 7, 2, 7, 2, 7, 2, 7, 2, 7, 2, 7, 2, 7, 2, 7, 2, 7, 2, 7, 2, 7, 2, 7, 2, 7, 2, 7, 2, 7, 2, 7, 2, 7, 2, 7, 2, 7, 2, 7, 2, 7, 2, 7, 2, 7, 2, 7, 2, 7, 2, 7, 2, 7, 2, 7, 2, 7, 2, 7, 2, 7, 2, 7, 2, 7, 2, 7, 2, 7, 2, 7, 2, 7, 2, 7, 2, 7, 2, 7, 2, 7, 2, 7, 2, 7, 2, 7 (list; constant; graph; refs; listen; history; text; internal format)
OFFSET

0,3

LINKS

Antti Karttunen, Table of n, a(n) for n = 0..1001

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

FORMULA

a(n) = (1/2)*[9+5*(-1)^n]-7*[C(2*n,n) mod 2]-2*{C[(n+1)^2,n+3] mod 2}-5*{C[(n+12)^4,n+14] mod 2}, with n>=0. - Paolo P. Lava, Nov 11 2009

PROG

(PARI) 1/440. \\ Charles R Greathouse IV, Jul 13 2016

(Scheme) (define (A021444 n) (cond ((<= n 1) 0) ((= 2 n) n) ((even? n) 7) (else 2))) ;; Antti Karttunen, Sep 14 2017

CROSSREFS

Cf. A010697.

Sequence in context: A208475 A082837 A138115 * A029632 A089588 A211780

Adjacent sequences:  A021441 A021442 A021443 * A021445 A021446 A021447

KEYWORD

nonn,cons,easy

AUTHOR

N. J. A. Sloane.

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 January 23 01:55 EST 2018. Contains 298093 sequences.