A359151 Numbers of the form 4u+1 with an odd number of prime factors (counted with multiplicity).

5, 13, 17, 29, 37, 41, 45, 53, 61, 73, 89, 97, 101, 105, 109, 113, 117, 125, 137, 149, 153, 157, 165, 173, 181, 193, 197, 229, 233, 241, 245, 257, 261, 269, 273, 277, 281, 285, 293, 313, 317, 325, 333, 337, 345, 349, 353, 357, 369, 373, 385, 389, 397, 401, 405, 409, 421, 425, 429, 433, 449, 457, 461

Offset

1,1

Links

Table of n, a(n) for n=1..63.

Prog

(PARI) isA359151(n) = A359150(n);

Crossrefs

Intersection of A016813 and A026424.

Setwise difference A067019 \ A359153.

Setwise difference A016813 \ A359161.

Cf. A002144, A191218 (subsequences).

Cf. A359150 (characteristic function).

Sequence in context: A113482 A208853 A265889 * A191218 A279857 A077426

Adjacent sequences: A359148 A359149 A359150 * A359152 A359153 A359154

Keyword

nonn

Author

Antti Karttunen, Dec 17 2022

Status

approved