|
|
A054249
|
|
Alternately subtract and add 1 to digits in decimal expansion of Pi.
|
|
0
|
|
|
2, 2, 3, 2, 4, 10, 1, 7, 4, 4, 4, 9, 8, 8, 8, 4, 1, 4, 7, 5, 5, 3, 5, 5, 2, 4, 7, 4, 1, 8, 8, 6, -1, 3, 7, 9, 3, 2, 8, 8, 0, 7, 8, 4, 8, 10, 2, 8, 4, 2, -1, 6, 7, 3, -1, 10, 6, 5, 8, 5, 3, 6, 8, 3, 2, 1, 6, 9, 0, 7, 3, 1, 5, 3, 7, 7, 1, 1, 7, 10, 8, 9, 5, 3, 7, 1, 2, 5, 7, 3, 4, 4, 3, 3, 0, 2, 6, 1, 5, 8, 8
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
1,1
|
|
LINKS
|
|
|
EXAMPLE
|
a(1)= 3 - 1 = 2, a(2)= 1 + 1 = 2, a(3) = 4 - 1 = 3
|
|
MATHEMATICA
|
Total/@Partition[Riffle[RealDigits[Pi, 10, 120][[1]], {-1, 1}, {2, -1, 2}], 2] (* Harvey P. Dale, Jan 20 2016 *)
|
|
CROSSREFS
|
|
|
KEYWORD
|
easy,sign,base
|
|
AUTHOR
|
Anonymous, Feb 13 2000
|
|
EXTENSIONS
|
|
|
STATUS
|
approved
|
|
|
|