KenCD — "78 since pattern becomes add multiple of 6 increasing every two additions. 4 seems to be an outlier, however. After 4 add 6 to 6, add 6 to 12 then add 12 to 18 then 12 to 30, add 18 to 42 then 18 to 60 to get 78. Finally 102 comes from adding 24 to 78."No, the next number after 60 in the sequence 4, 6, 12, 18, 30, 42, 60, ... is 72, not 78.
As I mentioned in my post above, the numbers in the sequence are not formed from previous numbers in the sequence.
I gave the solution in my previous post as well, Highlight with your cursor the blank space following the warning if you want to read it…
A difficult puzzler by those perfidious old farts from MIT.
KenCD — "4 seems to be an outlier, however."There are no "outliers" in mathematics. In physics, maybe. In engineering, all the time.