### References to unsolved

*15 seqfan posts*

*Sat Oct 29 01:58:54 CEST 2011* [seqfan] Re: a challenge: guess the formula

*Fri Oct 28 13:58:38 CEST 2011* [seqfan] a challenge: guess the formula

*Thu Feb 10 17:23:07 CET 2011* [seqfan] Re: Should this be cited as a link to A000396?

*Thu Feb 10 05:47:26 CET 2011* [seqfan] Should this be cited as a link to A000396?

*Fri Nov 20 20:16:47 CET 2009* [seqfan] Re: Generally known (to those who know of such things)

*Sun Aug 2 00:32:15 CEST 2009* [seqfan] Classical Chinese Combinatorics: Derivation of the Book of Changes Hexagram Sequence?

*Tue Mar 17 17:15:27 CET 2009* [seqfan] Re: An arithmetic conjecture

*Tue Mar 17 15:46:44 CET 2009* [seqfan] Re: An arithmetic conjecture

*Mon Mar 16 20:10:54 CET 2009* [seqfan] UPINT reference sought for mod 6 problem

*Mon Mar 16 18:48:31 CET 2009* [seqfan] Re: An arithmetic conjecture

*Mon Mar 16 17:20:56 CET 2009* [seqfan] Re: An arithmetic conjecture

*Thu Mar 5 06:23:52 CET 2009* [seqfan] n/n-1 Multiply Unitary[ Perfect Number

*Sat Feb 21 04:34:01 CET 2009* [seqfan] re open problems

*Sun Feb 15 12:21:05 CET 2009* [seqfan] Re: A greedy sequence

*Sun Feb 15 00:43:31 CET 2009* [seqfan] Re: A greedy sequence

Index of A-numbers in seqfan: by ascending order
by month
by frequency
by keyword

unsolved

Links to OEIS content are included according to
The OEIS End-User License Agreement
.