A352242 Regular triangle T(n,k) = (n-k)*(n^3-k^3) for n>=2 and 1 <= k <= n-1, read by rows.
7, 52, 19, 189, 112, 37, 496, 351, 196, 61, 1075, 832, 567, 304, 91, 2052, 1675, 1264, 837, 436, 127, 3577, 3024, 2425, 1792, 1161, 592, 169, 5824, 5047, 4212, 3325, 2416, 1539, 772, 217, 8991, 7936, 6811, 5616, 4375, 3136, 1971, 976, 271, 13300, 11907, 10432, 8869, 7236, 5575, 3952, 2457, 1204, 331
Offset: 2
Examples
Triangle begins:
7;
52, 19;
189, 112, 37;
496, 351, 196, 61;
1075, 832, 567, 304, 91;
2052, 1675, 1264, 837, 436, 127;
...
Links
- Michael De Vlieger, Table of n, a(n) for n = 2..11176 (rows n = 2..150, flattened)
Crossrefs
Programs
-
Mathematica
Table[(n - k) (n^3 - k^3), {n, 2, 11}, {k, n - 1}] // Flatten (* Michael De Vlieger, Mar 09 2022 *) -
PARI
row(n) = vector(n-1, k, (n-k)*(n^3-k^3));