A225258 T(n,k)=Number of distinct values of the sum of n products of three 0..k integers.
2, 5, 3, 11, 12, 4, 17, 36, 20, 5, 31, 75, 63, 28, 6, 41, 157, 141, 90, 36, 7, 66, 254, 284, 205, 117, 44, 8, 81, 434, 478, 409, 269, 144, 52, 9, 101, 635, 780, 694, 534, 333, 171, 60, 10, 121, 911, 1156, 1123, 910, 659, 397, 198, 68, 11, 174, 1237, 1667, 1668, 1466, 1126
Offset: 1
Links
- R. H. Hardin, Table of n, a(n) for n = 1..1703
Crossrefs
Row 1 is A027426
Formula
Empirical: column k is n*k^3 - A225263(k) for large n (n>4 suffices through k=138)
Comments