A059857 Alternating clock-face numbers.

12, 1, 11, 2, 10, 3, 9, 4, 8, 5, 7, 6, 6, 7, 5, 8, 4, 9, 3, 10, 2, 11, 1, 12, 12, 1, 11, 2, 10, 3, 9, 4, 8, 5, 7, 6, 6, 7, 5, 8, 4, 9, 3, 10, 2, 11, 1, 12, 12, 1, 11, 2, 10, 3, 9, 4, 8, 5, 7, 6, 6, 7, 5, 8, 4, 9, 3, 10, 2, 11, 1, 12, 12, 1, 11, 2, 10, 3, 9, 4, 8, 5, 7, 6, 6, 7, 5, 8, 4, 9, 3, 10, 2

Offset

0,1

Comments

Has period 24: a(n+24)=a(n).

Links

Table of n, a(n) for n=0..92.

Formula

If you start with 12 on a clock's face and move forward 1 it yields the number 1, then moving backward 2 yields 11, then moving forward 3 yields 2, moving backward 4 yields 10 and so forth.

Mathematica

PadRight[{}, 120, Riffle[Range[12, 1, -1], Range[12]]] (* Harvey P. Dale, Aug 26 2024 *)

Crossrefs

Sequence in context: A068329 A334074 A010215 * A322762 A070649 A255864

Adjacent sequences: A059854 A059855 A059856 * A059858 A059859 A059860

Keyword

nonn,easy

Author

Jason Earls, Feb 26 2001

Extensions

More terms from Henry Bottomley, Feb 28 2001

Status

approved