A129372 Triangle read by rows: T(n,k) = 1 if k divides n and n/k is odd, T(n,k) = 0 otherwise.

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

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:
  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: A102511 A266669 A129360 * A169591 A189295 A004539

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