A371083 Nonsquarefree numbers that are not divisible by p^p for any prime p.

9, 18, 25, 45, 49, 50, 63, 75, 90, 98, 99, 117, 121, 125, 126, 147, 150, 153, 169, 171, 175, 198, 207, 225, 234, 242, 245, 250, 261, 275, 279, 289, 294, 306, 315, 325, 333, 338, 342, 343, 350, 361, 363, 369, 375, 387, 414, 423, 425, 441, 450, 475, 477, 490, 495, 507, 522, 525, 529, 531, 539, 549, 550, 558, 575, 578

Offset

1,1

Comments

The asymptotic density of this sequence is Product_{p prime} (1 - 1/p^p) - 6/Pi^2 = 0.1140631325... . - Amiram Eldar, Mar 12 2024

Links

Antti Karttunen, Table of n, a(n) for n = 1..10000

Prog

(PARI) \\ See A371083.

Crossrefs

Intersection of A013929 and A048103.

Cf. A371084 (characteristic function), A371085 (subsequence), A059956.

Sequence in context: A069562 A072502 A195268 * A328252 A227279 A102042

Adjacent sequences: A371080 A371081 A371082 * A371084 A371085 A371086

Keyword

nonn

Author

Antti Karttunen, Mar 12 2024

Status

approved