Discussion
Thu Apr 23
17:18
Michel Marcus: I guess it is because Dressler says : It is known that 128 is the largest integer which is not expressible as a sum of distinct squares.
19:55
M. F. Hasler: Yes but this is the only "allusion" to this seq.: Does this justify to put the reference here? I think it would be better to leave it only in A001476. But I don't want to lose more energy in convincing that selection is more useful than accumulation...
Discussion
Thu Apr 23
16:22
M. F. Hasler: The Dressler & Parker paper deals with cubes, not squares, and belongs to A001476. (Of course it does not more harm here than would a paper about anything else, except for losing your time in case you hope to find something relevant for this sequence - in particular given the totally meaningless title of the paper.) Also, the "Sillke" link points to an email written by Jeff Adams, NOT by Sillke.
PROG
(PARI) select( is_A001422(n, m=n)={m^2>n&& m=sqrtint(n); n!=m^2&&!while(m>1, isSumOfSquares(n-m^2, m--)&&return)}, [1..128]) \\ M. F. Hasler, Apr 21 2020
Discussion
Tue Apr 21
12:04
M. F. Hasler: double-checked.
