A128206 Inverse of number triangle A128207.

1, 1, 1, 0, 1, 1, 0, 0, 2, 1, 0, 0, 0, 3, 1, 0, 0, 0, 0, 5, 1, 0, 0, 0, 0, 0, 8, 1, 0, 0, 0, 0, 0, 0, 13, 1, 0, 0, 0, 0, 0, 0, 0, 21, 1, 0, 0, 0, 0, 0, 0, 0, 0, 34, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 55, 1

Offset

0,9

Comments

Row sums are A001611. Subdiagonal is A000045(n+1).

Links

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

Example

Triangle begins
1,
1, 1,
0, 1, 1,
0, 0, 2, 1,
0, 0, 0, 3, 1,
0, 0, 0, 0, 5, 1,
0, 0, 0, 0, 0, 8, 1,
0, 0, 0, 0, 0, 0, 13, 1,
0, 0, 0, 0, 0, 0, 0, 21, 1,
0, 0, 0, 0, 0, 0, 0, 0, 34, 1,
0, 0, 0, 0, 0, 0, 0, 0, 0, 55, 1

Crossrefs

Sequence in context: A227819 A064287 A196389 * A371417 A103294 A198379

Adjacent sequences: A128203 A128204 A128205 * A128207 A128208 A128209

Keyword

nonn,tabl

Author

Paul Barry, Feb 19 2007

Status

approved