1,3

Restricted growth sequence transform of A329899.

Each positive natural number occurs exactly twice.

For all i, j > 1:

a(i) = a(j) => A329907(i) = A329907(j).

Antti Karttunen, Table of n, a(n) for n = 1..10000

a(n) = A085089(A329899(n)).

(PARI) A329904(n) = { my(k=A329899(n)); for(i=1, oo, if(A025487(i)==k, return(i))); };

Cf. A025487, A085089, A329899, A329905, A329907.

Sequence in context: A318284 A241321 A093936 * A331307 A331306 A119353

Adjacent sequences: A329901 A329902 A329903 * A329905 A329906 A329907

nonn

Antti Karttunen, Dec 24 2019

approved