A054237 Pair addition table cast as diagonal numbers.

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

Author

Marc LeBrun, Feb 07 2000

Keywords

• easy
• nonn
• tabl

Comments

Cast pairs 0,0 1,0 0,1 2,0 1,1, ... as 0,1,2,3,4,... Sequence shadows pair addition table.

Examples

			a(1,1)=3 because 1 shadows (1,0) and 3 shadows (2,0) and (1,0)+(1,0)=(2,0).
		

Links

• Sean A. Irvine, Java program (github)