OFFSET
1,1
COMMENTS
These are the row-sums of the triangle-version of A377046.
EXAMPLE
The third antidiagonal of A377046 is (9, 1, -3), so a(3) = 7.
MATHEMATICA
nn=20;
t=Table[Take[Differences[NestList[NestWhile[#+1&, #+1, SquareFreeQ[#]&]&, 4, 2*nn], k], nn], {k, 0, nn}];
Total/@Table[t[[j, i-j+1]], {i, nn}, {j, i}]
CROSSREFS
For squarefree instead of nonsquarefree numbers we have A377039.
The absolute value version is A377048.
For leading column we have A377049.
For first position of 0 in each row we have A377050.
A005117 lists the squarefree numbers.
KEYWORD
sign,new
AUTHOR
Gus Wiseman, Oct 19 2024
STATUS
approved