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0,1

Contains odd numbers from 1 to 999. See patterns in graph.

Zak Seidov, Table of n, a(n) for n = 0..499

n=3: a(3)=589 because 2n+1=7, 7*589 = 4123 = 123 (mod 1000).

n=499: a(499)=877 because 2n+1=999 and 999*877=876123 = 123 (mod 1000).

Sequence in context: A015042 A062233 A123171 * A192231 A077378 A031509

Adjacent sequences: A125094 A125095 A125096 * A125098 A125099 A125100

nonn

Zak Seidov, Nov 20 2006

approved