a(1)=1; for n>1, a(n)=a(n-1)-4 if n is already in the sequence, a(n)=a(n-1)+5 otherwise.
1, 6, 11, 16, 21, 17, 22, 27, 32, 37, 33, 38, 43, 48, 53, 49, 45, 50, 55, 60, 56, 52, 57
5 seqfan posts
Sun Dec 7 20:31:39 CET 2008 [seqfan] Re: A080906?
Sun Dec 7 20:24:54 CET 2008 [seqfan] Re: A080906?
Sun Dec 7 08:05:05 CET 2008 [seqfan] Re: A080906?
Sun Dec 7 07:26:27 CET 2008 [seqfan] Re: A080906?
Sun Dec 7 06:50:42 CET 2008 [seqfan] A080906?
Index of A-numbers in seqfan: by ascending order
by month
by frequency
by keyword
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