A329904 Position of A329899(n) in A025487.

1, 1, 2, 2, 3, 4, 5, 6, 4, 7, 3, 8, 9, 10, 11, 12, 13, 14, 15, 6, 16, 9, 5, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 11, 31, 32, 8, 33, 13, 7, 34, 35, 36, 37, 38, 39, 40, 41, 42, 22, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 15, 57, 58, 20, 12, 59, 60, 61, 17, 62, 10, 63, 64, 65, 66, 67, 68, 69

Offset: 1

Author

Antti Karttunen, Dec 24 2019

Keywords

• nonn

Comments

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).

Links

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

Crossrefs

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

Programs

PARI

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

Formula

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