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A328399 Lexicographically earliest infinite sequence such that a(i) = a(j) => A328475(i) = A328475(j) for all i, j. 3
1, 1, 2, 1, 3, 2, 4, 4, 5, 1, 6, 2, 7, 7, 8, 4, 9, 5, 10, 10, 11, 7, 12, 8, 13, 13, 14, 10, 15, 11, 16, 16, 17, 16, 18, 17, 19, 19, 20, 1, 21, 2, 22, 22, 23, 4, 24, 5, 25, 25, 26, 7, 27, 8, 28, 28, 29, 10, 30, 11, 31, 31, 32, 31, 33, 32, 34, 34, 35, 16, 36, 17, 37, 37, 38, 19, 39, 20, 40, 40, 41, 22, 42, 23, 43, 43, 44, 25, 45, 26, 46, 46, 47, 46, 48, 47 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,3
COMMENTS
Restricted growth sequence transform of A328475, defined as A328475(n) = A111701(A276086(n)).
LINKS
PROG
(PARI)
up_to = 32768;
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; };
A111701(n) = forprime(p=2, , if(n%p, return(n), n /= p));
A276086(n) = { my(m=1, p=2); while(n, m *= (p^(n%p)); n = n\p; p = nextprime(1+p)); (m); };
v328399 = rgs_transform(vector(up_to+1, n, A328475(n-1)));
A328399(n) = v328399[1+n];
CROSSREFS
Cf. A002110, A053589, A111701, A276086, A143293 (indices of 1's after a(0)=1).
Cf. also A328477.
Sequence in context: A368671 A183912 A144693 * A328171 A029139 A100927
KEYWORD
nonn
AUTHOR
Antti Karttunen, Oct 19 2019
STATUS
approved

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Last modified June 20 16:59 EDT 2024. Contains 373530 sequences. (Running on oeis4.)