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A249016 Indices of records in A055460 (number of primes dividing the squarefree part of n!). 3
1, 2, 3, 5, 13, 17, 21, 23, 33, 42, 43, 56, 57, 75, 84, 99, 101, 105, 109, 119, 133, 139, 157, 162, 163, 182, 183, 207, 208, 219, 220, 255, 257, 263, 267, 303, 305, 307, 315, 340, 341, 343, 383, 385, 387, 397, 411, 420, 421, 423, 469, 483, 485, 489, 505, 519, 523, 547, 552, 553, 581, 602, 603, 609, 618 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Max Alekseyev, Table of n, a(n) for n = 1..38282

PROG

(PARI) np=vector(10^6); b=-1; r=0; for(n=1, 10^6, f=factor(n); for(i=1, matsize(f)[1], if(f[i, 2]%2, r += (-1)^np[f[i, 1]]; np[f[i, 1]]=1-np[f[i, 1]]; )); if(r>b, b=r; print1(n, ", "))

CROSSREFS

Cf. A249017 (values of records), A055204

Sequence in context: A095083 A236183 A093077 * A241123 A038983 A235635

Adjacent sequences:  A249013 A249014 A249015 * A249017 A249018 A249019

KEYWORD

nonn

AUTHOR

Max Alekseyev, Oct 19 2014

STATUS

approved

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Last modified October 19 04:40 EDT 2019. Contains 328211 sequences. (Running on oeis4.)