A353641 Odd bisection of A353640.

1, 1, 3, 3, 3, 1, 1, 1, 3, 3, 3, 1, 1, 1, 3, 1, 1, 3, 3, 3, 1, 1, 1, 3, 3, 3, 1, 1, 1, 3, 3, 3, 1, 1, 1, 3, 3, 3, 1, 1, 1, 3, 3, 3, 1, 1, 1, 3, 3, 3, 1, 1, 1, 3, 3, 3, 1, 1, 1, 3, 3, 3, 1, 1, 1, 3, 3, 3, 1, 1, 1, 3, 3, 3, 1, 1, 1, 3, 3, 3, 1, 1, 1, 3, 3, 3, 1, 1, 1, 3, 3, 3, 1, 1, 1, 3, 3, 3, 1, 1, 1, 3, 3, 3, 1, 1

Offset

0,3

Links

Antti Karttunen, Table of n, a(n) for n = 0..65537

Index entries for sequences related to primorial base

Formula

a(n) = A353640(2*n+1) = A010873(A342002(2*n+1)).

Prog

(PARI)
A353640(n) = { my(s=0, m=1, p=2, e); while(n, e = (n%p); m *= p^(e>0); s += (e/p); n = n\p; p = nextprime(1+p)); ((s*m)%4); };
A353641(n) = A353640(n+n+1);

Crossrefs

Cf. A010873, A342002, A353640, A353642.

Cf. also A353631.

Sequence in context: A126066 A177693 A353631 * A131289 A130974 A064353

Adjacent sequences: A353638 A353639 A353640 * A353642 A353643 A353644

Keyword

nonn,base

Author

Antti Karttunen, May 01 2022

Status

approved