A118748 a(n) = Product_{k=1..n} P(k), where P(k) is the smallest prime >= 2*k.
2, 10, 70, 770, 8470, 110110, 1871870, 31821790, 604614010, 13906122230, 319840811290, 9275383527410, 268986122294890, 7800597546551810, 241818523943106110, 8947285385894926070, 331049559278112264590
Offset: 1