First 11 values of A121387 coincide with apparently unrelated new seq

[Ralf Stephan]

You wrote 
> The first 11 values are the same as the apparently unrelated A121387
> which begins:
> 25, 65, 85, 145, 169, 185, 205, 221, 265, 289, 305, 329, 365, 377,
> 445, 481, 485, 493

This looks to me like it can be defined as 'Numbers of the form
pq, with p and q primes of form 4i+1.' but who knows? The underlying
triangle A121388 is hopelessly underdefined to me.


ralf