A124747 Inverse of number triangle A124744.

1, 0, 1, 0, 0, 1, 0, 0, 1, 1, 0, 0, 1, 1, 1, 0, 0, 2, 2, 2, 1, 0, 0, 3, 3, 3, 2, 1, 0, 0, 7, 7, 7, 5, 3, 1, 0, 0, 12, 12, 12, 9, 6, 3, 1, 0, 0, 30, 30, 30, 23, 16, 9, 4, 1, 0, 0, 55, 55, 55, 43, 31, 19, 10, 4, 1

Offset

0,18

Comments

Third column and row sums give A047749.

Links

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

Example

Triangle begins
1,
0, 1,
0, 0, 1,
0, 0, 1, 1,
0, 0, 1, 1, 1,
0, 0, 2, 2, 2, 1,
0, 0, 3, 3, 3, 2, 1,
0, 0, 7, 7, 7, 5, 3, 1,
0, 0, 12, 12, 12, 9, 6, 3, 1

Crossrefs

Sequence in context: A078336 A076441 A319289 * A334888 A039981 A006140

Adjacent sequences: A124744 A124745 A124746 * A124748 A124749 A124750

Keyword

nonn,tabl

Author

Paul Barry, Nov 06 2006

Status

approved