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A304743
Restricted growth sequence transform of A046523(A280866(n)).
4
1, 2, 3, 2, 4, 5, 2, 4, 6, 3, 2, 4, 7, 2, 4, 6, 4, 6, 8, 4, 6, 4, 2, 2, 4, 9, 6, 2, 4, 10, 2, 4, 11, 5, 3, 4, 9, 12, 2, 4, 8, 6, 2, 4, 6, 4, 4, 6, 8, 4, 6, 8, 3, 2, 4, 13, 6, 2, 4, 14, 2, 4, 9, 6, 2, 4, 9, 9, 4, 6, 15, 6, 4, 4, 4, 9, 13, 4, 8, 12, 4, 9, 13, 4, 9, 16, 2, 4, 8, 9, 11, 2, 4, 6, 4, 7, 2, 4, 6, 12, 2, 4, 15, 4, 6
OFFSET
1,2
LINKS
PROG
(PARI)
\\ Needs also code from A280866:
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; };
v304743 = rgs_transform(vector(65539, n, A046523(A280866(n))));
A304743(n) = v304743[n];
CROSSREFS
KEYWORD
nonn
AUTHOR
Antti Karttunen, May 18 2018
STATUS
approved