OFFSET
0,3
COMMENTS
This sequence is not a permutation of nonnegative integers, example a(1) = a(14) = 1.
Row 1 of the XOR-triangle is the smallest number such that there is no duplicated value in any row of this triangle.
FORMULA
EXAMPLE
Example for a(8):
Row 9: 16 ... = a(8)
/ \
Row 8: 14 30 ...
/ \ / \
Row 7: 4 10 20 ...
/ \ / \ / \
Row 6: 5 1 11 31 ...
/ \ / \ / \ / \
Row 5: 3 6 7 12 19 ...
/ \ / \ / \ / \ / \
Row 4: 7 4 2 5 9 26 ...
/ \ / \ / \ / \ / \ / \
Row 3: 2 5 1 3 6 15 21 ...
/ \ / \ / \ / \ / \ / \ / \
Row 2: 1 3 6 7 4 2 13 24 ...
/ \ / \ / \ / \ / \ / \ / \ / \
Row 1: 0 1 2 4 3 7 5 8 16 ...
---------------------------------------
Row 9: a(8)
CROSSREFS
KEYWORD
nonn,base
AUTHOR
Thomas Scheuerle, Jul 14 2021
STATUS
approved