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

Offset: 1

Author

Ray Chandler, Oct 13 2008

Keywords

• nonn

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(n)^(1/2)))

Crossrefs

Cf. A070566.