**a(1)=1; a(n+1) is either a(n)-n or a(n)+n, where we choose the smallest one which is a positive integer that's not among the values a(1), ..., a(n).**

*1, 2, 4, 7, 3, 8, 14, 21, 13, 22, 12, 23, 11, 24, 10, 25, 9, 26, 44, 63, 43, 64, 42, 1*

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

*12 seqfan posts*

*Fri Mar 12 22:23:40 CET 2010* [seqfan] Re: seqs whose |differences| are 1,2,3,4,...

*Fri Mar 12 21:40:10 CET 2010* [seqfan] Re: seqs whose |differences| are 1,2,3,4,...

*Fri Mar 12 03:04:10 CET 2010* [seqfan] Re: seqs whose |differences| are 1,2,3,4,...

*Fri Mar 12 00:11:51 CET 2010* [seqfan] Re: seqs whose |differences| are 1,2,3,4,...

*Fri Mar 12 00:00:44 CET 2010* [seqfan] Re: seqs whose |differences| are 1,2,3,4,...

*Wed Mar 10 21:08:28 CET 2010* [seqfan] Re: seqs whose |differences| are 1,2,3,4,...

*Wed Mar 10 18:31:03 CET 2010* [seqfan] Re: seqs whose |differences| are 1,2,3,4,...

*Tue Mar 9 21:46:56 CET 2010* [seqfan] Re: seqs whose |differences| are 1,2,3,4,...

*Tue Mar 9 21:44:56 CET 2010* [seqfan] Re: seqs whose |differences| are 1,2,3,4,...

*Tue Mar 9 18:19:42 CET 2010* [seqfan] Re: seqs whose |differences| are 1,2,3,4,...

*Tue Mar 9 18:19:42 CET 2010* [seqfan] Re: seqs whose |differences| are 1,2,3,4,...

*Tue Mar 9 17:39:06 CET 2010* [seqfan] seqs whose |differences| are 1,2,3,4,...

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

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