



5, 7, 19, 41, 197, 2549, 4159, 8467, 9433, 26701, 27551, 46817, 57037, 91097, 130859, 153281, 157049, 197683, 351727, 423103, 466181, 517991, 526291, 567181, 575231, 652903, 663167, 772339, 1055231, 1062013, 1088239, 1171199, 1232461, 1551871, 1603297, 1662833, 2782469, 2920531, 2957917, 3226159
(list;
graph;
refs;
listen;
history;
text;
internal format)



OFFSET

1,1


LINKS



EXAMPLE

a(3) = 19 is a term because it is prime and A001414(20) = 9 = 1 + A001414(18).


MAPLE

spf:= proc(n) local t; add(t[1]*t[2], t=ifactors(n)[2]) end proc:
select(p > spf(p+1)=spf(p1)+1, [seq(ithprime(i), i=1..10^5)]);


CROSSREFS



KEYWORD

nonn


AUTHOR



STATUS

approved



