A361463 a(n) = 1 if A135506(n) == 3 (mod 4), otherwise 0.

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

Offset

1

Links

Antti Karttunen, Table of n, a(n) for n = 1..65537

Index entries for characteristic functions

Prog

(PARI)
up_to = 100000;
A135506list(up_to_n) = { my(v=vector(up_to), x1=1, x2); for(n=2, 1+up_to_n, x2 = x1+lcm(x1, n); v[n-1] = (x2/x1)-1; x1=x2); (v); };
v135506 = A135506list(up_to);
A135506(n) = v135506[n];
A361463(n) = (3==(A135506(n)%4));

Crossrefs

Characteristic function of A361464.

Cf. A135506, A361462.

Sequence in context: A103673 A028862 A011673 * A104853 A358775 A354981

Adjacent sequences: A361460 A361461 A361462 * A361464 A361465 A361466

Keyword

nonn

Author

Antti Karttunen, Mar 14 2023

Status

approved