A090172 Triangle read by rows, related to Pascal's triangle read mod 2.

1, 0, 0, 1, 1, 1, 1, 0, 0, 1, 0, 1, 1, 1, 0, 1, 0, 1, 1, 0, 1, 1, 0, 1, 1, 1, 0, 1, 0, 0, 1, 0, 0, 1, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 0, 1, 0, 1, 0, 1, 1, 1, 1, 1, 0, 1, 0, 1, 0, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1, 0, 0, 0, 0, 1, 1, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 1, 1, 0, 1, 0, 0, 0, 0

Offset: 0

Author

N. J. A. Sloane, Jan 19 2004

Keywords

• nonn
• easy
• tabl

Examples

			1; 0,0; 1,1,1; 1,0,0,1; 0,1,1,1,0; ...
		

Links

• Y. Moshe, The density of 0's in recurrence double sequences, J. Number Theory, 103 (2003), 109-121; see Fig. 2.

Crossrefs

Row sums: A091563. Cf. A007318, A083093, A090171-A090174.

Formula

a(n, k) = A091562(n, k) mod 2.

Extensions

Edited and extended by Christian G. Bower, Jan 20 2004