A037890 a(n)=(1/2)*Sum{|d(i)-e(i)|} where Sum{d(i)*4^i} is the base 4 representation of n and e(i) are the digits d(i) in reverse order.

0, 0, 0, 1, 0, 1, 2, 2, 1, 0, 1, 3, 2, 1, 0, 1, 0, 1, 2, 1, 0, 1, 2, 1, 0, 1, 2, 1, 0, 1, 2, 2, 1, 0, 1, 2, 1, 0, 1, 2, 1, 0, 1, 2, 1, 0, 1, 3, 2, 1, 0, 3, 2, 1, 0, 3, 2, 1, 0, 3, 2, 1, 0, 1, 0, 1, 2, 2, 1, 2, 3, 3, 2, 3, 4, 4, 3, 4, 5, 2, 1, 2, 3, 1, 0, 1, 2, 2, 1, 2

Offset

1,7

Links

Table of n, a(n) for n=1..90.

Crossrefs

Sequence in context: A172101 A301365 A109246 * A037898 A037836 A194522

Adjacent sequences: A037887 A037888 A037889 * A037891 A037892 A037893

Keyword

nonn,base

Author

Clark Kimberling

Status

approved