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A268254 Number of length-(n+1) 0..n arrays with new repeated values introduced in sequential order starting with zero.

%I A268254 #5 Jan 29 2016 12:41:46
%S A268254 3,17,143,1610,22710,384605,7594224,171161319,4333369912,121706300672,
%T A268254 3754131927947,126136021943207,4584723067123764,179223541390399501,
%U A268254 7497293121634632330,334153612151475666156,15807274255300507355559
%N A268254 Number of length-(n+1) 0..n arrays with new repeated values introduced in sequential order starting with zero.
%C A268254 Diagonal of A268261.
%H A268254 R. H. Hardin, <a href="/A268254/b268254.txt">Table of n, a(n) for n = 1..210</a>
%e A268254 Some solutions for n=5
%e A268254 ..0....4....2....3....1....1....4....4....2....2....1....4....5....4....1....4
%e A268254 ..3....2....1....0....3....0....3....0....0....5....0....5....0....2....3....0
%e A268254 ..0....4....2....1....2....2....1....3....0....0....1....1....2....5....0....2
%e A268254 ..3....0....1....0....3....5....5....5....4....0....3....5....0....3....3....0
%e A268254 ..5....2....4....0....2....2....2....3....1....0....5....4....1....2....0....3
%e A268254 ..1....4....2....4....4....3....4....2....3....2....4....5....3....3....5....2
%Y A268254 Cf. A268261.
%K A268254 nonn
%O A268254 1,1
%A A268254 _R. H. Hardin_, Jan 29 2016