A212412 - OEIS

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A212412

Parity of curling number of binary expansion of n.

5

1, 1, 1, 0, 0, 1, 1, 1, 1, 1, 0, 0, 0, 1, 1, 0, 0, 1, 1, 0, 0, 0, 1, 1, 1, 1, 0, 0, 0, 1, 1, 1, 1, 1, 1, 0, 0, 0, 1, 1, 1, 1, 1, 0, 0, 0, 1, 0, 0, 1, 1, 0, 0, 0, 0, 1, 1, 1, 0, 0, 0, 1, 1, 0, 0, 1, 1, 0, 0, 0, 1, 1, 1, 0, 0, 0, 0, 1, 1, 0, 0, 1, 0, 0, 0, 1

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OFFSET

0

COMMENTS

a(n) = A181935(n) mod 2;

a(A212440(n)) = 0 and a(A212441(n)) = 1;

A212439(n) = 2*n + a(n).

LINKS

Reinhard Zumkeller, Table of n, a(n) for n = 0..10000

FORMULA

a(n) = A000035(A181935(n)). - Omar E. Pol, Oct 28 2013

PROG

(Haskell)

a212412 = (`mod` 2) . a181935

CROSSREFS

Sequence in context: A325898 A117904 A259030 * A185906 A071003 A071002

Adjacent sequences: A212409 A212410 A212411 * A212413 A212414 A212415

KEYWORD

nonn

AUTHOR

Reinhard Zumkeller, May 17 2012

STATUS

approved