a(n) is the concatenation of the numbers appearing in row n of the lexicographically earliest prime pyramid (A051237).
1, 12, 123, 1234, 14325, 143256, 1432567, 12347658, 123476589, 12347658910
5 seqfan posts
Wed Mar 16 18:01:42 CET 2011 [seqfan] Re: A187871
Tue Mar 15 18:12:57 CET 2011 [seqfan] Re: A187871
Tue Mar 15 17:32:43 CET 2011 [seqfan] Re: put the numbers from 1 to n such the sum of two of them are prime
Mon Mar 14 17:08:23 CET 2011 [seqfan] Re: put the numbers from 1 to n such the sum of two of them are prime
Mon Mar 14 16:28:56 CET 2011 [seqfan] Re: put the numbers from 1 to n such the sum of two of them are prime
Index of A-numbers in seqfan: by ascending order
by month
by frequency
by keyword
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