A170990 Carryless product n X n in base 9.

0, 1, 4, 0, 7, 7, 0, 4, 1, 81, 100, 121, 135, 160, 97, 108, 130, 145, 324, 361, 400, 351, 394, 349, 378, 337, 370, 0, 55, 31, 0, 61, 34, 0, 58, 28, 567, 640, 634, 621, 619, 610, 594, 589, 577, 567, 577, 589, 594, 610, 619, 621, 634, 640, 0, 28, 58, 0, 34, 61, 0, 31, 55, 324, 370

Offset

0,3

Links

Seiichi Manyama, Table of n, a(n) for n = 0..6560

David Applegate, Marc LeBrun and N. J. A. Sloane, Carryless Arithmetic (I): The Mod 10 Version.

Index entries for sequences related to carryless arithmetic

Prog

(PARI) a(n) = fromdigits(Vec(Pol(digits(n, 9))^2)%9, 9); \\ Seiichi Manyama, Mar 09 2023

Crossrefs

For bases 2 through 10 see A000695, A169999, A170985-A170990 and A059729. A169821 is a less satisfactory variant.

Sequence in context: A242970 A070433 A169821 * A013666 A196533 A200518

Adjacent sequences: A170987 A170988 A170989 * A170991 A170992 A170993

Keyword

nonn,base,look

Author

N. J. A. Sloane, Aug 29 2010

Status

approved