A179045 Triangle T(n,k), 1<=k<=n, read by rows, related to A033485.

1, 2, 1, 3, 1, 1, 5, 2, 1, 1, 7, 3, 1, 1, 1, 10, 4, 2, 1, 1, 1, 13, 5, 3, 1, 1, 1, 1, 18, 7, 4, 2, 1, 1, 1, 1, 23, 9, 5, 3, 1, 1, 1, 1, 1, 30, 12, 6, 4, 2, 1, 1, 1, 1, 1, 37, 15, 7, 5, 3, 1, 1, 1, 1, 1, 1, 47, 19, 9, 6, 4, 2, 1, 1, 1, 1, 1, 1, 57, 23, 11, 7, 5, 3, 1, 1, 1, 1, 1, 1, 1, 70, 28, 14, 8, 6, 4

Offset

1,2

Comments

Column k=1 : A033485 ; column k=2 : A062188 ; row sums : A102378.

Links

Table of n, a(n) for n=1..97.

Formula

T(n,k)=T(n-1,k)+T([n/2],k), T(n,n)=1, T(n,k)=0 if k>n.

Example

Triangle begins : 1 ; 2,1 ; 3,1,1 ; 5,2,1,1 ; 7,3,1,1,1 ; ...

Crossrefs

Cf. A033485, A062188, A102378

Sequence in context: A168534 A026807 A338440 * A106740 A178534 A110619

Adjacent sequences: A179042 A179043 A179044 * A179046 A179047 A179048

Keyword

nonn,tabl

Author

Philippe Deléham, Jun 26 2010

Status

approved