OFFSET
1,2
COMMENTS
For n>=1, row n is a homogeneous linear recurrence sequence with palindromic recurrence coefficients in the sense described at A211701.
EXAMPLE
Northwest corner:
1...8....27...64....125...216...343
1...12...40...96....187...324...514
1...14...49...117...228...396...628
1...16...55...133...259...450...713
1...17...60...145...284...493...781
1...18...64...155...304...529...838
MATHEMATICA
f[n_, m_] := Sum[Floor[n^3/k], {k, 1, m}]
TableForm[Table[f[n, m], {m, 1, 40}, {n, 1, 16}]]
Flatten[Table[f[n + 1 - m, m], {n, 1, 14}, {m, 1, n}]]
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
Clark Kimberling, Apr 20 2012
STATUS
approved