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

0,1

Links

Table of n, a(n) for n=0..104.

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

Formula

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

Example

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

Crossrefs

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

Sequence in context: A030300 A168394 A072770 * A284369 A194661 A373136

Adjacent sequences: A090169 A090170 A090171 * A090173 A090174 A090175

Keyword

nonn,easy,tabl

Author

N. J. A. Sloane, Jan 19 2004

Extensions

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

Status

approved