A342838 Indices m such that A342834(m) is not squarefree.

21, 31, 32, 39, 42, 62, 67, 75, 82, 91, 93, 97, 104, 109, 121, 127, 135, 137, 139, 140, 145, 146

Offset

1,1

Comments

From the factorization of the initial terms of A342834, it may appear that A342834(n) is always squarefree, but this is false, and that present sequence lists the exceptions.

Links

Table of n, a(n) for n=1..22.

Prog

(PARI) f(n) = my(s=""); for (k=1, n, s = Str(s, precprime(10^k))); eval(s); \\ A342834
isok(m) = !issquarefree(f(m)); \\ Michel Marcus, Apr 01 2021

Crossrefs

Cf. A013929, A342834, A342835, A342836, A342837.

Sequence in context: A112375 A376294 A067599 * A261322 A123846 A336383

Adjacent sequences: A342835 A342836 A342837 * A342839 A342840 A342841

Keyword

nonn,base,more

Author

Bernard Schott and Daniel Suteu, Apr 01 2021

Status

approved