OFFSET
1,2
LINKS
Seiichi Manyama, Rows n = 1..99, flattened
David Applegate, Marc LeBrun and N. J. A. Sloane, Carryless Arithmetic (I): The Mod 10 Version.
EXAMPLE
Triangle begins:
1;
2, 4;
3, 6, 9;
4, 8, 2, 6;
5, 0, 5, 0, 5;
6, 2, 8, 4, 0, 6;
7, 4, 1, 8, 5, 2, 9;
8, 6, 4, 2, 0, 8, 6, 4;
9, 8, 7, 6, 5, 4, 3, 2, 1;
10, 20, 30, 40, 50, 60, 70, 80, 90, 100;
11, 22, 33, 44, 55, 66, 77, 88, 99, 110, 121;
12, 24, 36, 48, 50, 62, 74, 86, 98, 120, 132, 144;
PROG
(PARI) T(n, k) = fromdigits(Vec(Pol(digits(n))*Pol(digits(k)))%10);
CROSSREFS
AUTHOR
Seiichi Manyama, Mar 08 2023
STATUS
approved