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A131630
Consider the AES (or Rijndael) S-boxes and concatenate i and sbox[i] for all i. Then a(n) is the number of these pairs at Hamming distance n from 0, sbox[0].
1
1, 0, 0, 3, 7, 18, 41, 44, 34, 33, 40, 26, 6, 2, 1, 0, 0
OFFSET
0,4
COMMENTS
The S-box takes as input one byte and outputs one byte. So we are concatenating an 8-bit i with the 8-bit output of sbox[i].
LINKS
J. Alex Halderman, Seth D. Schoen, Nadia Heninger, William Clarkson, William Paul, Joseph A. Calandrino, Ariel J. Feldman, Jacob Appelbaum and Edward W. Felten, Lest We Remember: Cold Boot Attacks on Encryption Keys, 2008.
Wikipedia, Rijndael S-box
CROSSREFS
Cf. A131620.
Sequence in context: A076700 A265007 A026533 * A305652 A356938 A208771
KEYWORD
nonn,fini,full
AUTHOR
Nadia Heninger, May 28 2008
STATUS
approved