OFFSET
1,2
MATHEMATICA
nxt[{n_, a_}]:={n+1, 19a+n+1}; Transpose[Select[NestList[nxt, {1, 1}, 70000], Divisible[Last[#], First[#]]&]][[1]] (* Harvey P. Dale, Jan 21 2015 *)
PROG
(PARI) lista(nn) = my(s); for(k=1, nn, s=19*s+k; if(s%k==0, print1(k, ", "))); \\ Jinyuan Wang, Aug 08 2021
CROSSREFS
KEYWORD
nonn
AUTHOR
EXTENSIONS
More terms from Jinyuan Wang, Aug 08 2021
STATUS
approved