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
KEYWORD
easy,nonn
AUTHOR
Paul Barry, Jul 20 2005
STATUS
approved