A003985 Triangle with subscripts (1,1),(2,1),(1,2),(3,1),(2,2),(1,3), etc. in which entry (i,j) is i AND j.

1, 0, 0, 1, 2, 1, 0, 2, 2, 0, 1, 0, 3, 0, 1, 0, 0, 0, 0, 0, 0, 1, 2, 1, 4, 1, 2, 1, 0, 2, 2, 4, 4, 2, 2, 0, 1, 0, 3, 4, 5, 4, 3, 0, 1, 0, 0, 0, 4, 4, 4, 4, 0, 0, 0, 1, 2, 1, 0, 5, 6, 5, 0, 1, 2, 1, 0, 2, 2, 0, 0, 6, 6, 0, 0, 2, 2, 0, 1, 0, 3, 0, 1, 0, 7, 0, 1, 0, 3, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0

Offset: 1

Author

Marc LeBrun

Keywords

• tabl
• nonn
• easy

Crossrefs

Antidiagonal sums are in A006581.

Extensions

More terms from Larry Reeves (larryr(AT)acm.org), Sep 21 2000