A331281 If A061395(n) <= A001222(n), then a(n) = 1, otherwise a(n) = 0.

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

Offset

1

Links

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

Index entries for characteristic functions

Index entries for sequences computed from indices in prime factorization

Formula

For all n >= 1, a(A065091(n)) = 0, a(A088902(n)) = 1.

Prog

(PARI)
A061395(n) = if(n>1, primepi(vecmax(factor(n)[, 1])), 0);
A331281(n) = (A061395(n)<=bigomega(n));

Crossrefs

Characteristic function of {1} U A324521.

Cf. A001222, A061395, A065091, A088902.

Cf. also A331168, A331282.

Sequence in context: A078387 A189292 A331168 * A347950 A105470 A359824

Adjacent sequences: A331278 A331279 A331280 * A331282 A331283 A331284

Keyword

nonn

Author

Antti Karttunen, Jan 13 2020

Status

approved