

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



0, 12, 24, 36, 48, 60, 72, 84, 96, 108, 120, 132, 1, 13, 25, 37, 49, 61, 73, 85, 97, 109, 121, 133, 2, 14, 26, 38, 50, 62, 74, 86, 98, 110, 122, 134, 3, 15, 27, 39, 51, 63, 75, 87, 99, 111, 123, 135, 4, 16, 28, 40, 52, 64, 76, 88, 100, 112, 124, 136, 5, 17, 29, 41, 53, 65
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OFFSET

1,2


COMMENTS

The pair (m,n) is reflexive, i.e., when n=m, m=n.
In fact, for n = 12*i + j, with 0 <= i < 12; 0 <= j < 12, m = i + 12*j.  Lekraj Beedassy, Aug 09 2006


REFERENCES

A. P. Domoryad, Mathematical Games and Pastimes, Problem 15 pp. 242;289 Pergamon Press NY 1965.
Y. Perelman, Mathematics can be fun, pp. 2368 Mir Moscow.


LINKS



CROSSREFS



KEYWORD

fini,nonn


AUTHOR



STATUS

approved



