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A264616 Irregular triangle read by rows: T(n,k) = number of unsigned unichromosonal genomes with n genes at 4-break distance k from a fixed genome. 3
1, 1, 1, 1, 1, 5, 1, 15, 8, 1, 35, 84, 1, 70, 649, 1, 126, 3585, 1328, 1, 210, 14949, 25160 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,6

LINKS

Table of n, a(n) for n=0..22.

Nikita Alexeev, Anna Pologova, Max A. Alekseyev, Generalized Hultman Numbers and the Distribution of Multi-break Distances, arXiv:1503.05285, Mar 2015.

EXAMPLE

Triangle begins:

1,

1,

1,1,

1,5,

1,15,8,

1,35,84,

1,70,649,

1,126,3585,1328,

1,210,14949,25160,

...

CROSSREFS

Cf. A164652, A189507, A264614, A264615, A264617.

Sequence in context: A039807 A213590 A185263 * A157395 A157385 A157397

Adjacent sequences:  A264613 A264614 A264615 * A264617 A264618 A264619

KEYWORD

nonn,tabf,more

AUTHOR

N. J. A. Sloane, Nov 28 2015

STATUS

approved

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Last modified October 20 05:42 EDT 2017. Contains 293601 sequences.