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A261726 a(n) = binomial(prime(n+1)-1, prime(n)-1). 0
2, 6, 15, 210, 66, 1820, 153, 7315, 376740, 435, 1947792, 91390, 861, 163185, 20358520, 40475358, 1770, 90858768, 916895, 2556, 256851595, 1749060, 541931236, 132601016340, 3921225, 5151, 4967690, 5778, 6210820, 1378095785451705375, 11358880, 7858539612 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..32.

FORMULA

a(n) = binomial(prime(n+1)-1, prime(n)-1).

EXAMPLE

For n = 2, a(n) = binomial(prime(n+1)-1, prime(n)-1) = binomial(4,2) = 6.

PROG

(PARI) a(n) = binomial(prime(n+1)-1, prime(n)-1);

vector(35, n, a(n))

CROSSREFS

Cf. A000040, A001700, A104861.

Sequence in context: A190339 A078328 A038111 * A181993 A123475 A193341

Adjacent sequences:  A261723 A261724 A261725 * A261727 A261728 A261729

KEYWORD

nonn,easy

AUTHOR

Altug Alkan, Sep 14 2015

STATUS

approved

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Last modified September 25 21:33 EDT 2017. Contains 292500 sequences.