A177740 - OEIS

A177740

Triangle read by rows in which row n lists the number of parts in each of those partitions of n that have every part >=3.

1, 1, 1, 1, 2, 1, 2, 1, 2, 2, 1, 2, 2, 3, 1, 2, 2, 2, 3, 1, 2, 2, 2, 3, 3, 1, 2, 2, 2, 2, 3, 3, 3, 4, 1, 2, 2, 2, 2, 3, 3, 3, 3, 4, 1, 2, 2, 2, 2, 3, 2, 3, 3, 3, 3, 4, 4, 1, 2, 2, 2, 2, 3, 2, 3, 3, 3, 3, 3, 4, 3, 4, 4, 5, 1, 2, 2, 2, 2, 3, 2, 3, 2, 3, 3, 3, 3, 4, 3, 3, 4, 4, 4, 4, 5

(list; graph; refs; listen; history; text; internal format)

OFFSET

3,5

COMMENTS

The ordering of the partitions is described in A176210.

LINKS

J. S. Kimberley, Rows 3..39 of A177740 triangle, flattened.

EXAMPLE

3: 3 (1)

4: 4 (1)

5: 5 (1)

6: 6 or 3,3 (1, 2)

7: 7 or 3,4 (1, 2)

8: 8, 3,5 or 4,4 (1, 2, 2)

so sequence begins 1, 1, 1, 1,2, 1,2, ...

PROG

(Magma) [ #part: part in RestrictedPartitions(n, {3..n}), n in [0..16]];

CROSSREFS

The length of the rows is given by A008483.

Cf. A128628 for unrestricted partitions.

Sequence in context: A238894 A054740 A272947 * A118458 A118459 A274354

Adjacent sequences: A177737 A177738 A177739 * A177741 A177742 A177743

KEYWORD

easy,nonn,tabf

AUTHOR

Jason Kimberley, May 13 2010

EXTENSIONS

Edited (including b-file) by N. J. A. Sloane, Oct 05 2010

STATUS

approved