A283557 The number of positive integer sequences of length n with no duplicate substrings and a minimal product (i.e., the product of the sequence is A282164(n)).

1, 1, 3, 2, 2, 6, 6, 24, 24, 120

Offset

1,3

Links

Table of n, a(n) for n=1..10.

Peter Kagey, Examples of all sequences a(1)-a(10).

Example

For n = 7, the a(7) = 6 sequences are
1,3,1,2,2,1,1;
1,2,2,1,3,1,1;
1,3,1,1,2,2,1;
1,1,3,1,2,2,1;
1,2,2,1,1,3,1; and
1,1,2,2,1,3,1.

Crossrefs

Cf. A282164. A283558 is the sum analog.

Sequence in context: A272332 A197586 A111702 * A283558 A234713 A091029

Adjacent sequences: A283554 A283555 A283556 * A283558 A283559 A283560

Keyword

nonn,more

Author

Peter Kagey, Mar 10 2017

Status

approved