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A139438
Frieze pattern with 5 rows, read by diagonals.
2
1, 1, 2, 3, 1, 1, 3, 5, 2, 1, 1, 2, 1, 1, 1, 1, 1, 2, 3, 1, 1, 3, 5, 2, 1, 1, 2, 1, 1, 1, 1, 1, 2, 3, 1, 1, 3, 5, 2, 1, 1, 2, 1, 1, 1, 1, 1, 2, 3, 1, 1, 3, 5, 2, 1, 1, 2, 1, 1, 1, 1, 1, 2, 3, 1, 1, 3, 5, 2, 1, 1, 2, 1, 1, 1, 1, 1, 2, 3, 1, 1, 3, 5, 2, 1, 1, 2, 1, 1, 1, 1, 1, 2, 3, 1, 1, 3, 5, 2
OFFSET
0,3
COMMENTS
Period 15: repeat [1, 1, 2, 3, 1, 1, 3, 5, 2, 1, 1, 2, 1, 1, 1]. - Wesley Ivan Hurt, Jun 05 2016
FORMULA
Four adjacent entries
...A...
.B...C.
...D...
satisfy D = (BC-1)/A.
EXAMPLE
The frieze pattern is
... 1 1 1 1 1 1 1 ...
.....1 3 2 1 3 2 ...
....1 2 5 1 2 5 1 ...
.....1 3 2 1 3 2 ...
... 1 1 1 1 1 1 1 ...
CROSSREFS
Sequence in context: A141071 A004648 A265848 * A135392 A071947 A139343
KEYWORD
nonn,tabf
AUTHOR
N. J. A. Sloane, Jun 09 2008
STATUS
approved