A346245 Numbers k for which A003415(k) > k*A003557(k).

30, 210, 330, 390, 462, 510, 546, 570, 690, 714, 798, 858, 870, 930, 966, 1110, 1218, 1230, 1290, 1302, 1410, 1554, 1590, 1722, 1770, 1830, 2010, 2130, 2190, 2310, 2370, 2490, 2670, 2730, 2910, 3030, 3090, 3210, 3270, 3390, 3570, 3810, 3930, 3990, 4110, 4170, 4290, 4470, 4530, 4710, 4830, 4890, 5010, 5190, 5370, 5430

Offset

1,1

Comments

Numbers k such that A342001(k) > k.

Numbers k such that their arithmetic derivative (A003415(k)) is larger than A102631(k), k^2 / (squarefree kernel of k).

Links

Table of n, a(n) for n=1..56.

Crossrefs

Positions of negative terms in A346244.

Cf. A003415, A003557, A102631, A342001.

Seems to have many common terms with A181629, A265501 and A286652.

Sequence in context: A371721 A203617 A181629 * A129499 A286763 A347828

Adjacent sequences: A346242 A346243 A346244 * A346246 A346247 A346248

Keyword

nonn

Author

Antti Karttunen, Jul 19 2021

Status

approved