A198147 Numbers k for which there are non-isomorphic groups of order k whose core quandles are isomorphic.

27, 32, 54, 64, 81, 96, 100, 108, 125, 128, 135, 147, 160, 162, 189, 192, 200, 216, 224, 243, 250, 260, 270, 273, 288, 294, 297, 300, 320, 324, 340, 343, 351, 352, 375, 378, 399, 400, 405, 416, 432, 441, 448, 459, 480, 486, 500, 507, 513, 520, 540, 546, 567, 580, 588

Offset

1,1

Comments

This is a subsequence of sequence A118642.

Links

Table of n, a(n) for n=1..55.

David Joyce, A classifying invariant of knots, the knot quandle, J. Pure Appl. Algebra 23 (1982) 37-65.

Wikipedia, Quandles

Crossrefs

Sequence in context: A031408 A324248 A275188 * A144862 A117934 A173136

Adjacent sequences: A198144 A198145 A198146 * A198148 A198149 A198150

Keyword

nonn,hard

Author

James McCarron, Dec 21 2012

Status

approved