login
A331281
If A061395(n) <= A001222(n), then a(n) = 1, otherwise a(n) = 0.
4
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
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. also A331168, A331282.
Sequence in context: A078387 A189292 A331168 * A347950 A105470 A359824
KEYWORD
nonn
AUTHOR
Antti Karttunen, Jan 13 2020
STATUS
approved