A110619 Triangle of number of partitions of n with no part more than n/k; also partitions of n into n/k or fewer parts.

1, 2, 1, 3, 1, 1, 5, 3, 1, 1, 7, 3, 1, 1, 1, 11, 7, 4, 1, 1, 1, 15, 8, 4, 1, 1, 1, 1, 22, 15, 5, 5, 1, 1, 1, 1, 30, 18, 12, 5, 1, 1, 1, 1, 1, 42, 30, 14, 6, 6, 1, 1, 1, 1, 1, 56, 37, 16, 6, 6, 1, 1, 1, 1, 1, 1, 77, 58, 34, 19, 7, 7, 1, 1, 1, 1, 1, 1, 101, 71, 39, 21, 7, 7, 1, 1, 1, 1, 1, 1, 1, 135, 105

Offset

1,2

Links

Table of n, a(n) for n=1..93.

Formula

T(n, k)=A008284(n+floor[n/k], floor[n/k]). T(0, k)=1; T(n, k)=0 for 0<n<k; T(n, k)=1 for k<=n<2k; T(n, 1)=A000041(n); T(n, 2)=A110618(n).

Example

Rows start: 1; 2,1; 3,1,1; 5,3,1,1; 7,3,1,1,1; 11,7,4,1,1,1; etc.
T(7,3)=4 since 7 can be partitioned as 1+1+1+1+1+1+1, 2+1+1+1+1+1, 2+2+1+1+1, or 2+2+2+1 and also as 7, 6+1, 5+2, or 4+3.

Crossrefs

First column is A000041, second is A110618.

Sequence in context: A179045 A106740 A178534 * A354234 A191861 A350200

Adjacent sequences: A110616 A110617 A110618 * A110620 A110621 A110622

Keyword

nonn,tabl

Author

Henry Bottomley, Aug 01 2005

Status

approved