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A172470 First differences of A172468. 4
9, 52, 9, 61, 61, 9, 52, 9, 61, 61, 61, 9, 52, 9, 61, 61, 9, 52, 9, 61, 61, 61, 9, 52, 9, 61, 61, 9, 52, 9, 52, 9, 61, 61, 9, 52, 9, 61, 61, 61, 9, 52, 9, 61, 61, 9, 52, 9, 61, 61, 61, 9, 52, 9, 61, 61, 9, 52, 9, 61, 61, 61, 9, 52, 9, 61, 61, 9, 52, 9, 52, 9, 61, 61, 9, 52, 9, 61, 61, 61, 9 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
The numbers in the sequence are conjectured to be restricted to 9,52, or 61. Note that 61-52 = 9, (52+2)/(61-52) = (52+2)/9 = 6, (61+2)/(61-52) = (61+2)/9 = 7 and we have lcm(9,52,61) =28548 = 13^4 - 13 and (52+2)/9 + (61+2)/9 = 6+7 = 13.
LINKS
FORMULA
a(n) = A172468(n+1) - A172468(n).
CROSSREFS
Sequence in context: A181161 A152580 A197722 * A120665 A163941 A289418
KEYWORD
nonn
AUTHOR
Stephen Crowley, Feb 04 2010
STATUS
approved

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Last modified March 29 05:48 EDT 2024. Contains 371265 sequences. (Running on oeis4.)