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A300324
Triangle read by rows: row n gives the number of solutions to +-1 +- 3 +- 6 +- ... +- n*(n+1)/2 == k (mod n).
2
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
1,1
LINKS
EXAMPLE
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;
CROSSREFS
Cf. A000079 (row sums), A300307, A300328.
Sequence in context: A263788 A355335 A292144 * A298368 A072069 A230423
KEYWORD
nonn,tabl
AUTHOR
Seiichi Manyama, Mar 02 2018
STATUS
approved