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A223538 Key-matrix of compressed nim-multiplication table (A223537) read by antidiagonals. 3
0, 1, 1, 3, 2, 5, 5, 5, 7, 7, 9, 7, 4, 3, 25, 11, 11, 6, 6, 15, 15, 15, 13, 20, 8, 22, 20, 28, 20, 20, 25, 25, 28, 28, 17, 17, 30, 25, 17, 15, 10, 17, 19, 22, 68, 32, 32, 22, 22, 12, 12, 24, 24, 86, 86, 36, 34, 40, 28, 16, 14, 21, 27, 90, 104 (list; table; graph; refs; listen; history; text; internal format)
OFFSET
0,4
COMMENTS
Matrix A223537 has very large entries, which are listed in A223539. This matrix has the same pattern as A223537, but the actual entries are replaced by the index numbers of A223539. Surprisingly, although it is just a helper, the key-matrix is mathematically interesting on its own. (See the fractal patterns in the SVG files of the binary dual matrix.) There is even a connection between the binary digits of the actual matrix (A223537) and its key-matrix: It seems that for all matrices of size 8 or bigger the highest binary digits in the actual matrix are less than or equal to the highest binary digits in the key-matrix. (For technical reasons this is shown in the links section.)
LINKS
Tilman Piesk, 256x256 key-matrix
Tilman Piesk, Elements of dual matrix (15 SVGs)
Tilman Piesk, Walsh permutation; nimber multiplication (Wikiversity)
.
Connection between binary digits of A223537 (M) and the key matrix (KM):
Let M_n (KM_n) denote the matrix of binary digits with exponent n in matrix M (KM).
M_127(0..127,0..127)  <=  KM_12(0..127,0..127)
M_63(0..63,0..63)     <=  KM_10(0..63,0..63)
M_31(0..31,0..31)     <=  KM_8(0..31,0..31)
M_15(0..15,0..15)     <=  KM_6(0..15,0..15)
M_7(0..7,0..7)        <=  KM_4(0..7,0..7)
However, this row does not continue for the matrices of size 4, 2 and 1.
FORMULA
A223537(m,n) = A223539(a(m,n)).
CROSSREFS
Sequence in context: A141297 A303917 A186929 * A059319 A196438 A019828
KEYWORD
nonn,tabl
AUTHOR
Tilman Piesk, Mar 21 2013
STATUS
approved

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Last modified June 26 09:38 EDT 2024. Contains 373717 sequences. (Running on oeis4.)