

A304728


Restricted growth sequence transform of A246277(A303751(n)).


4



1, 2, 3, 2, 4, 5, 6, 5, 7, 8, 2, 9, 10, 3, 11, 12, 13, 4, 14, 15, 16, 17, 18, 19, 15, 20, 21, 16, 22, 23, 24, 5, 25, 26, 7, 27, 28, 29, 6, 30, 31, 2, 32, 33, 9, 34, 35, 36, 12, 37, 38, 3, 39, 40, 10, 41, 42, 43, 11, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 4, 55, 56, 8, 57, 58, 59, 13, 60, 61, 62, 15, 63, 64, 20, 65, 66, 67, 23, 68, 69, 16, 70, 71, 21
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OFFSET

1,2


COMMENTS



LINKS



PROG

(PARI)
A064989(n) = {my(f); f = factor(n); if((n>1 && f[1, 1]==2), f[1, 2] = 0); for (i=1, #f~, f[i, 1] = precprime(f[i, 1]1)); factorback(f)};
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; };


CROSSREFS



KEYWORD

nonn


AUTHOR



STATUS

approved



