login
A134244
Indices k such that k divides A007468(k).
4
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
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
Sequence in context: A083498 A172442 A061513 * A195874 A195873 A337854
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