A366376 Lexicographically earliest infinite sequence such that a(i) = a(j) => A366375(i) = A366375(j) for all i, j >= 0, where A366375(n) is the denominator of n / A332214(n).

1, 2, 2, 1, 2, 3, 1, 1, 2, 4, 3, 5, 1, 6, 1, 1, 2, 7, 4, 8, 3, 9, 5, 10, 1, 11, 6, 12, 1, 13, 1, 1, 2, 7, 7, 8, 4, 14, 8, 15, 3, 16, 9, 17, 5, 18, 10, 19, 1, 20, 11, 21, 6, 22, 12, 23, 1, 13, 13, 24, 1, 25, 1, 26, 2, 27, 7, 28, 7, 29, 8, 30, 4, 31, 14, 12, 8, 32, 15, 33, 3, 5, 16, 34, 9, 22, 17, 35, 5, 36, 18, 19, 10

Offset

0,2

Comments

Restricted growth sequence transform of A366375.

Links

Antti Karttunen, Table of n, a(n) for n = 0..65537

Prog

(PARI)
\\ Needs also program from A332214:
up_to = 65537;
rgs_transform(invec) = { my(om = Map(), outvec = vector(length(invec)), u=1); for(i=1, length(invec), if(mapisdefined(om, invec[i]), my(pp = mapget(om, invec[i])); outvec[i] = outvec[pp] , mapput(om, invec[i], i); outvec[i] = u; u++ )); outvec; };
A366375(n) = { my(u=A332214(n)); (u/gcd(n, u)); };
v366376 = rgs_transform(vector(1+up_to, n, A366375(n-1)));
A366376(n) = v366376[1+n];

Crossrefs

Cf. A332214, A366373, A366375.

Cf. also A365393, A365431, A366286 (compare the scatter plots).

Sequence in context: A345764 A236573 A333252 * A293375 A232174 A077766

Adjacent sequences: A366373 A366374 A366375 * A366377 A366378 A366379

Keyword

nonn,look

Author

Antti Karttunen, Oct 08 2023

Status

approved