OFFSET
1,1
LINKS
Robert Israel, Table of n, a(n) for n = 1..838
David A. Corneth, PARI program
EXAMPLE
a(3) = 187 is a term because 187,194,201,202,203 are consecutive semiprimes congruent to 1, 2, 3, 4, 5 (mod 6) respectively.
MAPLE
sp:= select(t -> numtheory:-bigomega(t)=2, [$4..10^6]):
sp6:= sp mod 6:
sp[select(i -> sp6[i..i+4] = [$1..5], [$1..nops(sp)-5])];
PROG
(PARI) \\ See PARI program
CROSSREFS
KEYWORD
nonn
AUTHOR
Zak Seidov and Robert Israel, Nov 04 2023
STATUS
approved