Number of different (by numeric value, not by structure) expressions, consisting of N symbols, each of them is one of: nullary 1, unary srqt(), binary +.
1, 1, 2, 3, 5, 8, 13, 20, 33, 54, 91, 154, 264, 455, 791, 1379, 2424, 4277, 7588, 13513
6 seqfan posts
Tue Mar 24 04:38:20 CET 2009 [seqfan] Re: A158415
Sun Mar 22 19:35:59 CET 2009 [seqfan] Re: A158415
Sun Mar 22 17:49:39 CET 2009 [seqfan] Re: A158415
Sun Mar 22 14:54:31 CET 2009 [seqfan] Re: A158415
Sun Mar 22 13:00:14 CET 2009 [seqfan] Re: A158415
Sun Mar 22 00:27:25 CET 2009 [seqfan] A158415
Index of A-numbers in seqfan: by ascending order
by month
by frequency
by keyword
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