A336642 One less than the largest square dividing n: a(n) = A008833(n)-1.

0, 0, 0, 3, 0, 0, 0, 3, 8, 0, 0, 3, 0, 0, 0, 15, 0, 8, 0, 3, 0, 0, 0, 3, 24, 0, 8, 3, 0, 0, 0, 15, 0, 0, 0, 35, 0, 0, 0, 3, 0, 0, 0, 3, 8, 0, 0, 15, 48, 24, 0, 3, 0, 8, 0, 3, 0, 0, 0, 3, 0, 0, 8, 63, 0, 0, 0, 3, 0, 0, 0, 35, 0, 0, 24, 3, 0, 0, 0, 15, 80, 0, 0, 3, 0, 0, 0, 3, 0, 8, 0, 3, 0, 0, 0, 15, 0, 48, 8, 99, 0, 0, 0, 3, 0

Offset

1,4

Links

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

Prog

(PARI) A336642(n) = ((n/core(n))-1);

Crossrefs

Cf. A008833.

Cf. also A336551, A336641, A336644.

Sequence in context: A117980 A065032 A007514 * A151671 A267502 A296605

Adjacent sequences: A336639 A336640 A336641 * A336643 A336644 A336645

Keyword

nonn

Author

Antti Karttunen, Jul 28 2020

Status

approved