OFFSET
0,2
COMMENTS
EXAMPLE
Irregular triangle begins:
1,
3,
9, 5,
15, 7,
25, 21, 9,
35, 27, 11,
49, 45, 33, 13,
63, 55, 39, 15,
...
MATHEMATICA
Table[n^2 - k^2, {n, 14}, {k, 0, n - 1}] /. n_ /; EvenQ@ n -> Nothing // Flatten (* Michael De Vlieger, Nov 25 2015 *)
PROG
(PARI) for(n=1, 20, for(k=0, n-1, s=n^2-k^2; if(s%2, print1(s, ", ")))) \\ Derek Orr, Dec 24 2015
CROSSREFS
KEYWORD
nonn,easy,tabf
AUTHOR
Paul Curtz, Nov 25 2015
STATUS
approved