A363523 k is a term of this sequence if and only if Clausen(k, 0) divides Clausen(k, 2). (Clausen = A160014.)

1, 3, 9, 15, 27, 45, 75, 81, 99, 105, 135, 225, 243, 255, 297, 315, 375, 405, 495, 525, 675, 729, 735, 765, 783, 891, 945, 1089, 1125, 1215, 1275, 1287, 1485, 1575, 1785, 1875, 2025, 2115, 2187, 2205, 2295, 2349, 2415, 2475, 2625, 2673, 2835, 3267, 3375, 3465

Offset: 1

Author

Peter Luschny, Jun 08 2023

Keywords

• nonn

Comments

k is a term of A124240 if and only if Clausen(k, 0) divides Clausen(k, 1).

Crossrefs

Cf. A160014, A124240.

Programs

Maple

# Using function 'Clausen' from A160014.
aList := m -> select(k -> irem(Clausen(k, 2), Clausen(k, 0)) = 0, [seq(1..m)]):
aList(3500);