A090172 - OEIS

The OEIS is supported by the many generous donors to the OEIS Foundation.

A090172

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

5

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

(list; table; graph; refs; listen; history; text; internal format)

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