A108036 Triangle read by rows: the triangle in A108035 surrounded by a border of 0's.

0, 0, 0, 0, 1, 0, 0, 2, 2, 0, 0, 3, 3, 3, 0, 0, 5, 5, 5, 5, 0, 0, 8, 8, 8, 8, 8, 0, 0, 13, 13, 13, 13, 13, 13, 0, 0, 21, 21, 21, 21, 21, 21, 21, 0, 0, 34, 34, 34, 34, 34, 34, 34, 34, 0, 0, 55, 55, 55, 55, 55, 55, 55, 55, 55, 0, 0, 89, 89, 89, 89, 89, 89, 89, 89, 89, 89, 0, 0, 144, 144, 144, 144

Offset

0,8

Links

Table of n, a(n) for n=0..82.

Formula

G.f.: x*y*(1+x+y)/((1-x-x^2)*(1-y-y^2)). [U coordinates]

Example

0; 0,0; 0,1,0; 0,2,2,0; 0,3,3,3,0; 0,5,5,5,5,0; ...

Crossrefs

Cf. A039913, A108035.

Sequence in context: A128540 A160692 A051775 * A190174 A263139 A063711

Adjacent sequences: A108033 A108034 A108035 * A108037 A108038 A108039

Keyword

nonn,tabl

Author

N. J. A. Sloane, Jun 01 2005

Status

approved