A047885 Array a(m,n) = pi(m+n) - pi(m) - pi(n) read by antidiagonals, where pi() = A000720 (m,n >= 0).

0, 0, 0, 0, 1, 0, 0, 1, 1, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 1, 0, 0, 0, 0, -1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, -1, 0, -1, 0, 0, 0, 0, 0, -1, -1, -1, -1, -1, -1, 0, 0, 0, 0, -1, -2, -1, -2, -1, -2, -1, 0, 0

Offset

0,59

Comments

A212210-A212213 are the preferred versions of this array.

Links

Table of n, a(n) for n=0..65.

Example

Beginning of array is
  0  0  0  0  0  0  0  0 ...
  0  1  1  0  1  0  1  0 ...
  0  1  0  0  0  0 -1 ...
  0  0  0 -1  0 -1 -1 ...
  ...

Crossrefs

Cf. A047886, A212210-A212213, A000720.

Sequence in context: A197366 A245715 A337736 * A072731 A221169 A212212

Adjacent sequences: A047882 A047883 A047884 * A047886 A047887 A047888

Keyword

sign,tabl,easy

Author

N. J. A. Sloane

Status

approved