A372487 a(n) is the denominator of the probability that there is a survivor in "group Russian roulette" starting with n people.

1, 1, 4, 27, 32, 28125, 2519424, 23162146875, 458647142400000, 7850009286973311176250, 14754517327872000000000000000, 782831631808408787429183093888778240000, 14334253326826803757070581682405376000000000000000, 6615519361823637433520391368199431823532478208000000000000000

Offset

1,3

Comments

See A372480 for more information.

Links

Hugo Pfoertner, Table of n, a(n) for n = 1..41

Example

A372487(n)/a(n): 1, 0, 3/4, 16/27, 15/32, 11704/28125, 1105685/2519424, 11327177474/23162146875, 244115733950627/458647142400000, ...

Prog

(PARI) \\ Uses functions P(n, k) and a372486_7(m) from A372486
apply (x->denominator(x), a372486_7(14))

Crossrefs

A372486 are the corresponding numerators.

Sequence in context: A129204 A239283 A082872 * A274854 A054411 A051506

Adjacent sequences: A372484 A372485 A372486 * A372488 A372489 A372490

Keyword

nonn,frac

Author

Hugo Pfoertner, May 04 2024

Status

approved