A366805 - OEIS

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A366805

Lexicographically earliest infinite sequence such that a(i) = a(j) => A366803(i) = A366803(j) for all i, j >= 0.

1, 2, 2, 2, 2, 3, 2, 4, 2, 5, 6, 3, 2, 4, 4, 4, 2, 7, 8, 5, 9, 10, 5, 5, 2, 4, 3, 4, 4, 11, 4, 3, 2, 12, 13, 7, 10, 14, 7, 15, 16, 17, 18, 10, 7, 15, 9, 5, 2, 4, 3, 4, 5, 5, 4, 3, 4, 6, 8, 11, 4, 3, 3, 3, 2, 19, 10, 12, 16, 20, 12, 19, 21, 22, 23, 14, 12, 19, 10, 15, 24, 25, 26, 17, 27, 26, 17, 24, 12, 19, 14, 15

(list; graph; refs; listen; history; text; internal format)

OFFSET

0,2

COMMENTS

Restricted growth sequence transform of A366803.

The scatter plot has quite interesting structure.

LINKS

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

PROG

(PARI)

\\ Needs also program from A366803:

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; };

v366805 = rgs_transform(vector(1+up_to, n, A366803(n-1)));

A366805(n) = v366805[1+n];

CROSSREFS

Cf. A003415, A005940, A008836, A347395, A366803.

Cf. also A366796, A366802.

Sequence in context: A373988 A334868 A305979 * A293223 A361514 A029348

Adjacent sequences: A366802 A366803 A366804 * A366806 A366807 A366808

KEYWORD

nonn,look

AUTHOR

Antti Karttunen, Oct 26 2023

STATUS

approved