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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 (list; graph; refs; listen; history; text; internal format)
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. 236-8 Mir Moscow.

LINKS

Table of n, a(n) for n=1..66.

CROSSREFS

Cf. A121577.

Sequence in context: A094529 A270571 A044852 * A044897 A008594 A033024

Adjacent sequences:  A121575 A121576 A121577 * A121579 A121580 A121581

KEYWORD

fini,nonn

AUTHOR

Lekraj Beedassy, Aug 08 2006

STATUS

approved

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Last modified November 21 11:01 EST 2018. Contains 317447 sequences. (Running on oeis4.)