login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A278588 Triangle read by rows: T(p_1,p_2) = maximal period of a decimal fraction (r/s)*(t/u) given that r/s has period p_1 and t/u has period p_2 (1 <= p_1 <= p_2). 2
9, 18, 198, 27, 54, 2997, 36, 396, 108, 39996, 45, 90, 135, 180, 499995, 54, 594, 5994, 3564, 270, 5999994, 63, 126, 189, 252, 315 (list; table; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
Arnout Jaspers, Megaperiodieke Breuken Maken, Pythagoras, Number 5, April 2016, pp. 26-29.
Arnout Jaspers, Creating Mega-Periodic Fractions (Loose English translation from R. J. Mathar).
EXAMPLE
Triangle begins (read down columns):
...1.....2....3....4....5.....6......7....(p_2)
1..9....18...27...36...45....54.....63
2......198...54..396...90...594....126
3..........2997..108..135..5994....189
4..............39996..180..3564....252
5..................499995...270....315
...
(p_1)
CROSSREFS
Cf. A110807 (diagonal?)
Sequence in context: A222811 A002169 A050685 * A133361 A353183 A005400
KEYWORD
nonn,tabl
AUTHOR
N. J. A. Sloane, Dec 03 2016, based on English translations provided by Arie Bos and R. J. Mathar.
STATUS
approved

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

License Agreements, Terms of Use, Privacy Policy. .

Last modified February 26 02:39 EST 2024. Contains 370335 sequences. (Running on oeis4.)