[seqfan] Runs of semiprimes of alternating parity

[zak seidov]

Just two examples:{21,22,25,26,33,34,35,38,39,46,49}{40681,40682,40691,40694,40701,40706,40711,40714,40717,40718,40721}
Longer runs?Thx,
Zak