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A054237
Pair addition table cast as diagonal numbers.
2
0, 1, 1, 2, 3, 2, 3, 4, 4, 3, 4, 6, 5, 6, 4, 5, 7, 7, 7, 7, 5, 6, 8, 8, 10, 8, 8, 6, 7, 10, 9, 11, 11, 9, 10, 7, 8, 11, 11, 12, 12, 12, 11, 11, 8, 9, 12, 12, 15, 13, 13, 15, 12, 12, 9, 10, 13, 13, 16, 16, 14, 16, 16, 13, 13, 10, 11, 15, 14, 17, 17, 17, 17, 17, 17, 14, 15, 11, 12, 16, 16
OFFSET
0,4
COMMENTS
Cast pairs 0,0 1,0 0,1 2,0 1,1, ... as 0,1,2,3,4,... Sequence shadows pair addition table.
LINKS
Sean A. Irvine, Java program (github)
EXAMPLE
a(1,1)=3 because 1 shadows (1,0) and 3 shadows (2,0) and (1,0)+(1,0)=(2,0).
CROSSREFS
Sequence in context: A106788 A123175 A143998 * A360495 A129600 A355663
KEYWORD
easy,nonn,tabl
AUTHOR
Marc LeBrun, Feb 07 2000
STATUS
approved