A123587 - OEIS

A123587

Number of bars that must change on a standard digital clock when the minutes change from n-1 to n.

5, 4, 5, 2, 3, 3, 1, 5, 4, 1, 6, 4, 5, 2, 3, 3, 1, 5, 4, 1, 7, 4, 5, 2, 3, 3, 1, 5, 4, 1, 4, 4, 5, 2, 3, 3, 1, 5, 4, 1, 5, 4, 5, 2, 3, 3, 1, 5, 4, 1, 5, 4, 5, 2, 3, 3, 1, 5, 4, 1, 5, 4, 5, 2, 3, 3, 1, 5, 4, 1, 6, 4, 5, 2, 3, 3, 1, 5, 4, 1, 7, 4, 5, 2, 3, 3, 1, 5, 4, 1, 4, 4, 5, 2, 3, 3, 1, 5, 4, 1, 5, 4, 5, 2, 3, 3, 1, 5, 4, 1, 5, 4, 5, 2, 3, 3, 1, 5, 4, 1

(list; graph; refs; listen; history; text; internal format)

OFFSET

0,1

COMMENTS

Cyclic with period 60.

LINKS

Table of n, a(n) for n=0..119.

EXAMPLE

a(20)=7 because when the clock changes from 19 to 20 minutes, 1 bar turns off and 4 bars turn on in the tens digit for the "0" to become a "1" and 1 bar turns off and 1 turns on in the units digit for the "9" to become a "0". 1 + 4 + 1 + 1 = 7.

CROSSREFS

Cf. A006942, A010371, A063720.

Sequence in context: A246729 A337029 A293557 * A018840 A058209 A160789

Adjacent sequences: A123584 A123585 A123586 * A123588 A123589 A123590

KEYWORD

easy,nonn,base,dumb

AUTHOR

Danny Rorabaugh, Nov 13 2006

STATUS

approved