A300324 Triangle read by rows: row n gives the number of solutions to +-1 +- 3 +- 6 +- ... +- n*(n+1)/2 == k (mod n).

2, 4, 0, 0, 4, 4, 8, 0, 8, 0, 8, 4, 8, 8, 4, 32, 0, 16, 0, 16, 0, 24, 24, 16, 12, 12, 16, 24, 64, 0, 64, 0, 64, 0, 64, 0, 40, 72, 60, 44, 60, 60, 44, 60, 72, 224, 0, 208, 0, 192, 0, 192, 0, 208, 0, 176, 188, 188, 180, 196, 184, 184, 196, 180, 188, 188

Offset: 1

Author

Seiichi Manyama, Mar 02 2018

Keywords

• nonn
• tabl

Examples

			First few rows are:
   2;
   4,  0;
   0,  4,  4;
   8,  0,  8,  0;
   8,  4,  8,  8,  4;
  32,  0, 16,  0, 16,  0;
  24, 24, 16, 12, 12, 16, 24;
  64,  0, 64,  0, 64,  0, 64, 0;
		

Links

• Seiichi Manyama, Rows n = 1..140, flattened

Crossrefs

Cf. A000079 (row sums), A300307, A300328.