The OEIS mourns the passing of Jim Simons and is grateful to the Simons Foundation for its support of research in many branches of science, including the OEIS.
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!)
A121578 Values m of number pairs (m,n) which yield associated matching times on the clock with interchanged hour and minute hands for corresponding n in A121577. 1

%I #9 Dec 23 2015 22:51:22

%S 0,12,24,36,48,60,72,84,96,108,120,132,1,13,25,37,49,61,73,85,97,109,

%T 121,133,2,14,26,38,50,62,74,86,98,110,122,134,3,15,27,39,51,63,75,87,

%U 99,111,123,135,4,16,28,40,52,64,76,88,100,112,124,136,5,17,29,41,53,65

%N Values m of number pairs (m,n) which yield associated matching times on the clock with interchanged hour and minute hands for corresponding n in A121577.

%C The pair (m,n) is reflexive, i.e., when n=m, m=n.

%C In fact, for n = 12*i + j, with 0 <= i < 12; 0 <= j < 12, m = i + 12*j. - _Lekraj Beedassy_, Aug 09 2006

%D A. P. Domoryad, Mathematical Games and Pastimes, Problem 15 pp. 242;289 Pergamon Press NY 1965.

%D Y. Perelman, Mathematics can be fun, pp. 236-8 Mir Moscow.

%Y Cf. A121577.

%K fini,nonn

%O 1,2

%A _Lekraj Beedassy_, Aug 08 2006

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 June 7 02:59 EDT 2024. Contains 373140 sequences. (Running on oeis4.)