Would this web site idea, if desirable, be easy to implement?

[N. J. A. Sloane]

This is just triangular numbers n(n+1)/2 where n is not congruent to 3 
or 4 mod 8.  (Since the numbers not the difference of two squares are 
precisely those congruent to 2 mod 4.)

Franklin T. Adams-Watters

-----Original Message-----
From: Peter Pein <petsie at dordos.net>

The same holds for T(n) is a difference of squares (did not try 
superseeker
yet):

{0, 1, 3, 15, 21, 28, 36, 45, 55, 91, 105, 120, 136, 153, 171, 231, 
253, 276,
300, 325, 351, 435, 465, 496, 528, 561, 595, 703, 741, 780, 820, 861, 
903,
1035, 1081, 1128, 1176, 1225, 1275, 1431, 1485, 1540, 1596, 1653, 1711, 
1891,
1953}






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