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A129372 Triangle read by rows: T(n,k) = 1 if k divides n and n/k is odd, T(n,k) = 0 otherwise. 8
1, 0, 1, 1, 0, 1, 0, 0, 0, 1, 1, 0, 0, 0, 1, 0, 1, 0, 0, 0, 1, 1, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 1, 0, 0, 0, 0, 0, 1, 0, 1, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Row sums = A001227: (1, 1, 2, 1, 2, 2, 2, 1, 3, 2,...).

LINKS

Andrew Howroyd, Table of n, a(n) for n = 1..1275

FORMULA

Equals A051731 * A115359.

EXAMPLE

First few rows of the triangle are:

1;

0, 1;

1, 0, 1;

0, 0, 0, 1;

1, 0, 0, 0, 1;

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

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

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

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

...

PROG

(PARI) T(n, k)=if(n%k, 0, n/k%2==1) \\ Andrew Howroyd, Aug 10 2018

CROSSREFS

Cf. A051731, A115359.

Sequence in context: A128937 A102511 A129360 * A169591 A004539 A023960

Adjacent sequences:  A129369 A129370 A129371 * A129373 A129374 A129375

KEYWORD

nonn,tabl

AUTHOR

Gary W. Adamson, Apr 11 2007

EXTENSIONS

Name changed and terms a(56) and beyond from Andrew Howroyd, Aug 10 2018

STATUS

approved

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Last modified October 16 16:39 EDT 2018. Contains 316266 sequences. (Running on oeis4.)