A328241 Numbers n for which A327860(n) = A003415(A276086(n)) is not a squarefree number.

0, 8, 13, 16, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 31, 36, 44, 45, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 64, 70, 72, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 112, 113, 114, 115, 116, 117, 118, 119, 120, 121

Offset

1,2

Links

Antti Karttunen, Table of n, a(n) for n = 1..20000

Index entries for sequences related to primorial base

Prog

(PARI)
A327860(n) = { my(m=1, i=0, s=0, pr=1, nextpr); while((n>0), i=i+1; nextpr = prime(i)*pr; if((n%nextpr), my(e=((n%nextpr)/pr)); m *= (prime(i)^e); s += (e / prime(i)); n-=(n%nextpr)); pr=nextpr); (s*m); };
isA328241(n) = !issquarefree(A327860(n));

Crossrefs

Cf. A003415, A008966, A276086, A327860.

Cf. A328242 (complement).

Sequence in context: A214412 A080361 A054295 * A287159 A272486 A057486

Adjacent sequences: A328238 A328239 A328240 * A328242 A328243 A328244

Keyword

nonn

Author

Antti Karttunen, Oct 10 2019

Status

approved