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A110437
A weighted sum of Jacobi function values.
3
1, 11, 111, 1101, 11111, 111111, 1101001, 11111111, 111111111, 1101100101, 11111111111, 111101111011, 1101101101101, 11111111111111, 111111111111111, 1101101101001101, 11110101101110011, 111111111111111111
OFFSET
1,2
COMMENTS
Can be regarded as base 2 version of A110436. It would appear that a(n) has all 1's whenever 2n+1 is prime.
FORMULA
a(n) = Sum_{k=0..n} abs(Jacobi(n-k, 2k+1))*10^k.
CROSSREFS
Sequence in context: A283703 A284399 A284540 * A266624 A266790 A266592
KEYWORD
easy,nonn
AUTHOR
Paul Barry, Jul 20 2005
STATUS
approved