147

“the least positive number that can be written as p^2 + p*q + q^2 in exactly 2 ways where p and q are primes and p <= q. "

ref:OEIS A295795

155

"Largest number with exactly 22 representations as a sum of 7 positive squares."

ref:OEIS A274027

162

"Smallest number larger than 1 such that n^4 is the average of a positive cube and a positive fifth power."

https://oeis.org/wiki/Talk:Riffs_and_Rotes#59281

I noticed it had a property I dubbed “Squarefree All The Way Down” (SATWD).

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