

A180158


How many ways are there to score a break of n points at snooker? Assuming an infinite number of reds are available, along with the usual six colors, and a break alternates redcolorred...


0



1, 1, 0, 1, 2, 2, 3, 5, 7, 9, 13, 20, 28, 39, 57, 82, 116, 166, 239, 342, 488, 699, 1002, 1433, 2050, 2936, 4203, 6014, 8608
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OFFSET

0,5


LINKS

Table of n, a(n) for n=0..28.


FORMULA

a(n)=a(n3)+a(n4)+a(n5)+a(n6)+a(n7)+a(n8)


EXAMPLE

For n=0 there is one way to score zero points  pot nothing, potting a single red is the one way to have a break of one, a break of two is impossible (as defined here), a break of three can only be achieved with a red followed by a yellow,...


CROSSREFS

Sequence in context: A061565 A077075 A190660 * A320689 A173693 A058278
Adjacent sequences: A180155 A180156 A180157 * A180159 A180160 A180161


KEYWORD

nonn


AUTHOR

Rob Cummings (robc(AT)rocoto.demon.co.uk), Aug 14 2010


STATUS

approved



