A359781 Parity of A359780, where A359780 is the Dirichlet inverse of the characteristic function of the numbers with even arithmetic derivative (A003415).

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

Offset

1

Links

Antti Karttunen, Table of n, a(n) for n = 1..100000

Index entries for characteristic functions

Formula

a(n) = A359780(n) mod 2.

a(n) <= A358680(n). [See comments in A359780]

a(A056913(n)) = 1.

Prog

(PARI) A359781(n) = (A359780(n)%2);

Crossrefs

Parity of A359780 and of A359790.

Characteristic function of A359783, whose complement is A359782.

Cf. A056913, A358680, A359784 (where differs from A358680).

Cf. also A359764 [= a(A003961(n)], A359774.

Sequence in context: A120523 A269625 A359828 * A030315 A119498 A070912

Adjacent sequences: A359778 A359779 A359780 * A359782 A359783 A359784

Keyword

nonn

Author

Antti Karttunen, Jan 13 2023

Status

approved