1,1

First differs from A188569 at a(24). It appears that this coincides with A188569 in a large number of terms. - Omar E. Pol, Feb 20 2013

Table of n, a(n) for n=1..66.

Table[NumberFieldClassNumber[Sqrt[-24*n + 1]], {n, 100}] (* T. D. Noe, Jul 15 2011 *)

Cf. A188569.

Sequence in context: A093670 A185011 A175144 * A188569 A274140 A212294

Adjacent sequences: A183051 A183052 A183053 * A183055 A183056 A183057

nonn

Omar E. Pol, Jul 14 2011

More terms and new definition suggested by David Scambler, Jul 15 2011

Extended by T. D. Noe, Jul 15 2011

Edited by Omar E. Pol, Feb 26 2013

approved