A378454 Characteristic function of A267124, primitive practical numbers

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

Offset

1

Links

Antti Karttunen, Table of n, a(n) for n = 1..100008

Index entries for characteristic functions

Formula

For all n >= 1, A008966(n)*A322860(n) <= a(n) <= A322860(n).

Prog

(PARI) A378454 = is_A267124;

Crossrefs

Characteristic function of A267124.

Cf. A005153, A008966, A322860.

Sequence in context: A094875 A359456 A012245 * A256436 A253903 A255849

Adjacent sequences: A378451 A378452 A378453 * A378456 A378457 A378458

Keyword

nonn,new

Author

Antti Karttunen, Dec 01 2024

Status

approved