OFFSET
1,2
COMMENTS
See A317678 for detailed information. Since there is no solution satisfying the criteria for n=1, a(1)=1 is set to complete the triangle.
EXAMPLE
Triangle begins:
1;
5, 23;
7, 31, 103;
7, 17, 47, 67;
7, 31, 43, 103, 211;
19, 47, 61, 89, 131, 313;
7, 23, 103, 167, 263, 359, 503;
...
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
Hugo Pfoertner, Aug 10 2018
STATUS
approved
