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A304757 Restricted growth sequence transform of A046523(A304755(n)). 2
1, 2, 3, 2, 4, 5, 6, 4, 5, 7, 8, 9, 10, 8, 9, 7, 11, 3, 2, 4, 12, 13, 3, 14, 8, 11, 12, 4, 15, 16, 3, 2, 4, 12, 13, 3, 14, 8, 11, 12, 4, 15, 17, 3, 13, 18, 13, 19, 12, 20, 8, 14, 21, 14, 8, 22, 23, 12, 19, 24, 3, 2, 4, 12, 13, 3, 14, 8, 11, 12, 4, 15, 16, 13, 3, 12, 19, 18, 13, 21, 14, 20, 19, 12, 25, 26, 27, 28, 29, 30, 26, 31, 32, 33, 4, 5, 6, 15, 12, 4 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
LINKS
PROG
(PARI)
A046523(n) = { my(f=vecsort(factor(n)[, 2], , 4), p); prod(i=1, #f, (p=nextprime(p+1))^f[i]); }; \\ From A046523
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; };
v304757 = rgs_transform(vector(up_to, n, A046523(A304755(n)))); \\ Needs also code from A304755
A304757(n) = v304757[n];
CROSSREFS
Compare also to the scatter plots of A304098, A304729, A304730 and A304732.
Sequence in context: A297157 A304492 A305303 * A140503 A304732 A304729
KEYWORD
nonn
AUTHOR
Antti Karttunen, May 21 2018
STATUS
approved

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Last modified February 26 01:31 EST 2024. Contains 370335 sequences. (Running on oeis4.)