A134244 Indices k such that k divides A007468(k).

1, 2, 4, 6, 8, 10, 38, 47, 86, 108, 122, 322, 345, 446, 556, 665, 756, 1122, 1476, 4838, 6274, 10556, 12383, 38774, 42776, 46239, 210215, 232276, 517144, 1125321, 2561652

Offset

1,2

Links

Table of n, a(n) for n=1..31.

Prog

(PARI) { p=2 ; i=1 ; for(j=1, 13000, psum=p ; for(k=2, j, p=nextprime(p+1) ; psum += p ; ) ; if(psum % j ==0, print(j) ; ) ; p=nextprime(p+1) ; ) ; } \\ R. J. Mathar, Jan 24 2008

Crossrefs

Cf. A134245, A134246.

Sequence in context: A083498 A172442 A061513 * A195874 A195873 A337854

Adjacent sequences: A134241 A134242 A134243 * A134245 A134246 A134247

Keyword

nonn,more

Author

Enoch Haga, Oct 15 2007, Oct 16 2007

Extensions

Better definition from R. J. Mathar, Nov 16 2007

Entries checked by R. J. Mathar, Jan 24 2008

a(24)-a(26) from Max Alekseyev, Jul 29 2011

a(27)-a(28) from Chai Wah Wu, Jan 14 2020

a(29) from Chai Wah Wu, Jan 16 2020

a(30)-a(31) from Giovanni Resta, Jan 24 2020

Status

approved