A104861 Number of compositions (ordered partitions) of the n-th prime into n positive integers.

1, 2, 6, 20, 210, 792, 8008, 31824, 319770, 6906900, 30045015, 600805296, 5586853480, 25518731280, 239877544005, 4481381406320, 79960182801345, 387221678682300, 6848956078664700, 63484158299081520, 312049055023946856, 5469191608792974920, 50825908693881519120

Offset

1,2

Links

Table of n, a(n) for n=1..23.

Formula

a(n) = binomial(prime(n)-1, n-1). - Vladeta Jovovic, Apr 25 2005

Crossrefs

Cf. A101810.

Sequence in context: A156334 A296519 A082690 * A074859 A162682 A103160

Adjacent sequences: A104858 A104859 A104860 * A104862 A104863 A104864

Keyword

nonn

Author

Emeric Deutsch & Zak Seidov, Apr 24 2005

Status

approved