A365799 Parity of the Dirichlet inverse of the characteristic function of triangular numbers (A010054).

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

Offset

1

Links

Antti Karttunen, Table of n, a(n) for n = 1..101025

Index entries for characteristic functions

Formula

a(n) = A000035(A365800(n)).

Prog

(PARI) A365799(n) = (A365800(n)%2); \\ Uses also code from A365800.

Crossrefs

Sequence A365800 reduced modulo 2.

Cf. A000035, A000217, A010054.

Sequence in context: A173857 A114482 A371844 * A186518 A127829 A127831

Adjacent sequences: A365796 A365797 A365798 * A365800 A365801 A365802

Keyword

nonn

Author

Antti Karttunen, Oct 05 2023

Status

approved