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A134576
Triangle read by rows: T(n,k) = n^2*A051731(n,k).
3
1, 4, 4, 9, 0, 9, 16, 16, 0, 16, 25, 0, 0, 0, 25, 36, 36, 36, 0, 0, 36, 49, 0, 0, 0, 0, 0, 49, 64, 64, 0, 64, 0, 0, 0, 64, 81, 0, 81, 0, 0, 0, 0, 0, 81, 100, 100, 0, 0, 100, 0, 0, 0, 0, 100, 121, 0, 0, 0, 0, 0, 0, 0, 0, 0, 121, 144, 144, 144, 144, 0, 144, 0, 0, 0, 0, 0, 144
OFFSET
1,2
LINKS
Andrew Howroyd, Table of n, a(n) for n = 1..1275 (first 50 rows)
FORMULA
Equals A127733 * A051731 as infinite lower triangular matrices.
EXAMPLE
First few rows of the triangle:
1;
4, 4;
9, 0, 9;
16, 16, 0, 16;
25, 0, 0, 0, 25;
36, 36, 36, 0, 0, 36;
49, 0, 0, 0, 0, 0, 49;
...
PROG
(PARI) T(n, k) = if(n%k==0, n^2, 0) \\ Andrew Howroyd, Sep 20 2025
CROSSREFS
Row sums are A034714.
Column 1 and main diagonal is A000290.
Sequence in context: A071775 A269594 A378770 * A176441 A363683 A143183
KEYWORD
nonn,tabl
AUTHOR
Gary W. Adamson, Nov 02 2007
EXTENSIONS
New name and a(56) onwards from Andrew Howroyd, Sep 20 2025
STATUS
approved