A161974 a(n) = number of equalities of the form A010060(n+k) = A010060(n), k=1,2,3.

1, 2, 1, 2, 1, 1, 1, 1, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 1, 1, 1, 1, 2, 1, 2, 1, 1, 1, 1, 1, 2, 1, 2, 1, 1, 1, 1, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 1, 1, 1, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 1, 1, 1, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 1, 1, 1, 1, 2, 1, 2, 1, 1, 1, 1, 1, 2, 1, 2, 1

Offset

0,2

Comments

See comment to A161916. 3-a(n) is the number of equalities of kind A010060(n+k) = 1-A010060(n), k=1,2,3.

Links

Table of n, a(n) for n=0..100.

Prog

(PARI) a(n)=sum(k=1, 3, hammingweight(n)%2==hammingweight(n+k)%2) \\ Charles R Greathouse IV, Aug 20 2013

Crossrefs

Cf. A161916, A161890, A161824, A161817, A161674, A161673, A161639, A161641, A161627, A161579, A161580, A121539, A131323, A036554, A010060.

Sequence in context: A227195 A111620 A111628 * A316190 A358236 A330738

Adjacent sequences: A161971 A161972 A161973 * A161975 A161976 A161977

Keyword

nonn,easy

Author

Vladimir Shevelev, Jun 23 2009

Extensions

Missing a(24)=1 inserted by Georg Fischer, Jun 21 2024

Status

approved