OFFSET
1,1
LINKS
G. C. Greubel, Rows n = 1..50 of the triangle, flattened
EXAMPLE
Triangle begins as:
2;
4, 3;
6, 6, 4;
8, 9, 8, 5;
10, 12, 12, 10, 6;
12, 15, 16, 15, 12, 7;
14, 18, 20, 20, 18, 14, 8;
16, 21, 24, 25, 24, 21, 16, 9;
18, 24, 28, 30, 30, 28, 24, 18, 10;
20, 27, 32, 35, 36, 35, 32, 27, 20, 11;
MAPLE
A141429 := proc(n, k)
(k+1)*(n-k+1) ;
end proc:
seq(seq(A141429(n, m), m=1..n), n=1..14) ; # R. J. Mathar, Nov 10 2011
MATHEMATICA
Table[(k+1)*(n-k+1), {n, 15}, {k, n}]//Flatten
PROG
(Magma) [(k+1)*(n-k+1): k in [1..n], n in [1..15]]; // G. C. Greubel, Mar 30 2021
(Sage) flatten([[(k+1)*(n-k+1) for k in (1..n)] for n in (1..15)]) # G. C. Greubel, Mar 30 2021
CROSSREFS
KEYWORD
AUTHOR
Roger L. Bagula and Gary W. Adamson, Aug 06 2008
EXTENSIONS
Edited by G. C. Greubel, Mar 30 2021
STATUS
approved