OFFSET
1,3
COMMENTS
A089398(n) = n-th column sum of binary digits of k*2^(k-1), where summation is over all k>=1, without carrying from columns sums that may exceed 2.
EXAMPLE
a(7)=8 since 2^8+1=257=(1)+(0)2+(2)2^2+(1)2^3+(1)2^4+(1)2^5+(3)2^6,
and A089398 begins: {1,0,2,1,1,1,3,2,2,0,3,2,2,2,4,3,3,1,...}.
CROSSREFS
KEYWORD
nonn
AUTHOR
Paul D. Hanna, Oct 30 2003
STATUS
approved