A129599 - OEIS

A129599

Prime-factorization encoded partition code for the Łukasiewicz-word, variant of A129593.

1, 3, 25, 25, 343, 35, 35, 343, 35, 14641, 847, 847, 847, 55, 847, 55, 847, 14641, 847, 55, 847, 847, 55, 371293, 24167, 24167, 1573, 1183, 24167, 1183, 1573, 24167, 1183, 1183, 1183, 1183, 65, 24167, 1183, 1183, 1183, 65, 1573, 1183, 24167

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OFFSET

0,2

COMMENTS

In addition to all the automorphisms whose signature permutation satisfies the more restricted condition A127301(SP(n)) = A127301(n) for all n, there are also general tree-rotating automorphisms like *A057501, *A057502, *A069771 and *A069772 that satisfy also the condition A129599(SP(n)) = A129599(n) for all n. However, in contrast to A129593 this is not invariant under the automorphism *A072797. A000041(n) distinct values (seem to) occur in each range [A014137(n)..A014138(n)].

LINKS

A. Karttunen, Table of n, a(n) for n = 0..625

OEIS Wiki, Łukasiewicz words

Index entries for sequences related to Łukasiewicz

FORMULA

Construction: add one to each number of the Łukasiewicz-word of a general plane tree encoded by A014486(n) (i.e. A079436(n)) except the first number, sort the numbers into ascending order and interpreting it as a partition of a natural number, encode it in the manner explained in A129595.

EXAMPLE

The terms A079436(5), A079436(6) and A079436(8) are 2010, 2100 and 1110. After adding one to each number except the first one we get 2121, 2211 and 1221, each one which produces partition 1+1+2+2. Converting it to prime-exponents like explained in A129595, we get 2^0 * 3^0 * 5^1 * 7^1 = 35, thus a(5) = a(6) = a(8) = 35.

CROSSREFS

Variant: A129593.

Sequence in context: A076962 A370416 A304480 * A042899 A266702 A264937

Adjacent sequences: A129596 A129597 A129598 * A129600 A129601 A129602

KEYWORD

nonn

AUTHOR

Antti Karttunen, May 01 2007

STATUS

approved