A169999 Carryless product n X n in base 3.

0, 1, 1, 9, 16, 13, 9, 13, 16, 81, 100, 91, 144, 142, 157, 117, 112, 133, 81, 91, 100, 117, 133, 112, 144, 157, 142, 729, 784, 757, 900, 961, 931, 819, 877, 853, 1296, 1369, 1333, 1278, 1249, 1237, 1413, 1381, 1456, 1053, 1117, 1099, 1008, 997, 1030, 1197, 1183, 1141

Offset: 0

Author

N. J. A. Sloane, Aug 29 2010

Keywords

• nonn
• base
• look

Links

• Antti Karttunen, Table of n, a(n) for n = 0..19682
• David Applegate, Marc LeBrun and N. J. A. Sloane, Carryless Arithmetic (I): The Mod 10 Version
• Index entries for sequences related to carryless arithmetic

Crossrefs

Main diagonal of A325820.

For bases 2 through 10 see A000695, A169999, A170985-A170990 and A059729.

Programs

PARI

A325820sq(b, c) = fromdigits(Vec(Pol(digits(b,3))*Pol(digits(c,3)))%3, 3);
A169999(n) = A325820sq(n,n); \\ Antti Karttunen, Jun 17 2019