A284431 - OEIS

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A284431

The number of positive integer sequences of length n with no duplicate substrings of length greater than 1, every number different from its neighbors, and a minimal sum (i.e., the sum of the sequence is A282166(n)).

%I #9 Mar 28 2017 15:02:50

%S 1,2,1,6,2,42,12,116

%N The number of positive integer sequences of length n with no duplicate substrings of length greater than 1, every number different from its neighbors, and a minimal sum (i.e., the sum of the sequence is A282166(n)).

%e For n = 5, the a(5) = 2 sequences are [1,3,1,2,1] and [1,2,1,3,1], each with a sum of A282166(5) = 8.

%Y Cf. A282166.

%K nonn,more

%O 1,2

%A _Peter Kagey_, Mar 27 2017