A359163 Numbers of the form 4u+3 with an even number of prime factors (counted with multiplicity).

15, 35, 39, 51, 55, 87, 91, 95, 111, 115, 119, 123, 135, 143, 155, 159, 183, 187, 203, 215, 219, 235, 247, 259, 267, 287, 291, 295, 299, 303, 315, 319, 323, 327, 335, 339, 351, 355, 371, 375, 391, 395, 403, 407, 411, 415, 427, 447, 451, 459, 471, 495, 511, 515, 519, 527, 535, 543, 551, 559, 579, 583

Offset: 1

Author

Antti Karttunen, Dec 17 2022

Keywords

• nonn

Examples

			135 = 3 * 3 * 3 * 5 has an even number of prime factors and is of the form 4u+3, therefore 135 is included in this sequence.
		

Crossrefs

Intersection of A004767 and A028260.

Setwise difference A004767 \ A359153.

Setwise difference A046337 \ A359161.

Cf. A359162 (characteristic function).

Cf. A080774 (subsequence).

Programs

PARI

isA359163(n) = A359162(n);