12,26,40,54... (+14) 68
16,24,32,40...(+8) 48
91,82,73,64,..(-9) 55
705,712,719,726...(+7) 733
481,472,463... (-9) 454
881,871,861... (-10) 851
90,190,170,270,.. (+100, - 20) 250, 350, 330
14,21,35...(7 умн на простое число, след простое 7, потом 11) 49, 77
111.121,131... (+10) 141