A139551 Triangle read by rows: T(n,k) = if n>=3*k and n<3*k*A014963(k-1) then k else 1 T(n,0)=1.

1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 1, 1, 1, 2, 3, 1, 1, 1, 1, 1, 1, 1, 1, 2, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 3, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 3, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1

Offset

0,24

Comments

Row products give A139552.

Links

Table of n, a(n) for n=0..104.

Example

Row products of the triangle are:
1 = 1
1*1 = 1
1*1*1 = 1
1*1*1*1 = 1
1*1*1*1*1 = 1
1*1*1*1*1*1 = 1
1*1*2*1*1*1*1 = 2
1*1*2*1*1*1*1*1 = 2
1*1*2*1*1*1*1*1*1 = 2

Prog

(Excel) =if(and(row()-1>=(column()-1)*3; row()-1 < A014963(k-1)*(column()-1)*3); column()-1; 1)

Crossrefs

Cf. A139552, A139547, A003418.

Sequence in context: A246588 A026492 A182284 * A022931 A303825 A043280

Adjacent sequences: A139548 A139549 A139550 * A139552 A139553 A139554

Keyword

nonn,tabl

Author

Mats Granvik, Apr 27 2008

Status

approved