A145554 - OEIS

The OEIS is supported by the many generous donors to the OEIS Foundation.

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).

Other ways to Give

A145554

"Compact" numbers that are neither prime nor a square of a prime; see reference for definition.

57, 87, 93, 117, 145, 177, 189, 205, 219, 237, 249, 261, 267, 301, 321, 327, 345, 387, 393, 415, 447, 453, 471, 477, 485, 515, 519, 535, 555, 591, 597, 625, 639, 657, 669, 681, 687, 699, 717, 723, 747, 783, 795, 801, 807, 835, 849, 873, 895, 903, 925, 933

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

LINKS

Ray Chandler, Table of n, a(n) for n = 1..3900

Bhupinder Singh Anand, A Minimal Prime Generating Theorem that suggests the Prime Difference is O(pi(p(sqrt(n)))

CROSSREFS

Cf. A070566.

Sequence in context: A086097 A172333 A200932 * A111320 A147468 A147036

Adjacent sequences: A145551 A145552 A145553 * A145555 A145556 A145557

KEYWORD

nonn

AUTHOR

Ray Chandler, Oct 13 2008

STATUS

approved