a(n)=5*n!-1
4, 4, 9, 29, 119, 599, 3599, 25199, 201599, 1814399, 18143999, 199583999
5 seqfan posts
Mon Feb 22 22:24:46 CET 2010 [seqfan] Re: A173279 and A173280
Mon Feb 22 22:02:17 CET 2010 [seqfan] Re: A173279 and A173280
Mon Feb 22 21:56:51 CET 2010 [seqfan] Re: A173279 and A173280
Mon Feb 22 21:12:18 CET 2010 [seqfan] Re: A173279 and A173280
Mon Feb 22 20:09:43 CET 2010 [seqfan] Re: A173279 and A173280
Index of A-numbers in seqfan: by ascending order
by month
by frequency
by keyword
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