OFFSET
1,1
COMMENTS
Values of k such that A103448(k) = 0.
LINKS
G. C. Greubel, Table of n, a(n) for n = 1..1000
EXAMPLE
12 belongs to the sequence because the only squarefree values of binomial(12,m) are 1, 2*3*11, 2*3*11, 1, on which the Mobius function takes the values 1,-1,-1,1, respectively.
8 does not belong to the sequence because the only squarefree value of binomial(8,m) are 1, 2*5*7, 1, on which the Moebius function takes the values 1,-1,1, respectively.
MATHEMATICA
f:= Table[A103448[n], {n, 0, 1050}];
Select[Range[0, 1000], f[[#]] == 0 &] - 1 (* G. C. Greubel, Jun 17 2021 *)
PROG
(PARI) is(k) = sum(m=0, k, moebius(binomial(k, m)))==0 \\ Felix Fröhlich, Jun 18 2021
CROSSREFS
KEYWORD
nonn
AUTHOR
Emeric Deutsch, Feb 07 2005
STATUS
approved