A243592 Numbers n such that there is no indecomposable group of order n.

1, 15, 33, 35, 45, 51, 65, 69, 77, 85, 87, 91, 95, 99, 105, 115, 119, 123, 133, 135, 141, 143, 145, 153, 159, 161, 165, 175, 177, 185, 187, 195, 207, 209, 213, 215, 217, 221, 231, 235, 245, 247, 249, 255, 259, 261, 265, 267, 285, 287, 295, 297, 299, 303, 315, 319, 321, 323, 325, 329, 335, 339, 341, 345, 357, 365, 369, 371

Offset: 1

Author

Joerg Arndt, Jun 07 2014

Keywords

• nonn

Comments

Numbers n such that A090751(n) = 0.

Includes all non-prime-power members of A051532. - Eric M. Schmidt, Jun 07 2014

Links

• Joerg Arndt, Table of n, a(n) for n = 1..506
• Paul Erdős, Péter P. Pálfy, On the orders of directly indecomposable groups. Paul Erdős memorial collection. Discrete Math. 200 (1999), no. 1-3, 165-179.