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A118762 First differences of A118757. 2
1, 1, 1, 1, 1, 1, 1, 1, 1, 10, -1, -1, -1, -1, -1, -1, -1, -1, -1, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 10, -1, -1, -1, -1, -1, -1, -1, -1, -1, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 10, -1, -1, -1, -1, -1, -1, -1, -1, -1, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 10, -1, -1, -1, -1, -1, -1, -1, -1, -1, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 10, -1, -1, -1, -1, -1, -1, -1, -1, -1 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,10
COMMENTS
a(10^k-1) = 10^k for 0<k<=3, but a(9999)=-1, a(9998)=10000;
abs(a(n)) = 10^k not for all n: e.g. a(1155) = A118757(1156) - A118757(1155) = 1123 - 1121 = 2.
LINKS
CROSSREFS
Cf. A118768.
Sequence in context: A307978 A367614 A367616 * A360160 A360159 A284100
KEYWORD
sign
AUTHOR
Reinhard Zumkeller, May 01 2006
STATUS
approved

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Last modified April 19 11:14 EDT 2024. Contains 371791 sequences. (Running on oeis4.)