A324334 Numbers d such that A324331(x)=d^2 not only for squarefree semiprimes x (A006881) but also for x in A324333.

3, 5, 7, 8, 9, 10, 13, 15, 17, 19, 23, 26, 28, 31, 33, 37, 40, 46, 48, 49, 55, 61, 62, 63, 65, 78, 80, 82, 96, 99, 118, 122, 126, 127, 129, 142, 144, 145, 148, 157, 159, 163, 166, 172, 176, 179, 185, 226, 228, 230, 240, 242, 244, 246, 249, 255, 257, 258, 288, 296, 303, 320, 321, 328, 342, 354, 357, 358, 360

Offset

1,1

Links

Table of n, a(n) for n=1..69.

B. Alspach, Research problems, Problem 18, Discrete Math 40 (1982), page 126.

Example

A324331(45) = 64, a square, even though 45 is not squarefree semiprime, so 8 is a term, and 45 is in A324332.

Crossrefs

Cf. A000010, A000203, A006881.

Cf. A324331, A324332, A324333 (complement).

Sequence in context: A335575 A047746 A111638 * A370600 A080262 A025050

Adjacent sequences: A324331 A324332 A324333 * A324335 A324336 A324337

Keyword

nonn

Author

Michel Marcus, Feb 23 2019

Status

approved