Vous avez cherché: factdouble (Anglais - Allemand)

factdouble
zweifakultÄt

factdouble(number)
zweifakultÄt(zahl)

factdouble(6) returns 48
factdouble(6) ergibt 48

=factdouble(6) returns 48.
=zweifakultÄt(6) ergibt 48.

factdouble(0) returns 1 by definition.
per definition ergibt zweifakultÄt(0) 1.

for even numbers factdouble(n) returns:
für gerade zahlen berechnet zweifakultÄt(n):

the factdouble() function calculates the double factorial of a number, i. e. x!!.
die funktion factdouble() berechnet die doppelte fakultät des parameters. der mathematische audruck dazu ist x!!.

abs, ceil, ceiling, count, counta, countblank, countif, cur, div, eps, even, exp, fact, factdouble, fib, floor, gamma, gcd, g_product, int, inv, kproduct, lcm, ln, log, log10, log2, logn, max, maxa, mdeterm, min, mina, minverse, mmult, mod, mround, multinomial, multiply, munit, odd, pow, power, product, quotient, rand, randbernoulli, randbetween, randbinom, randexp, randnegbinom, randnorm, randpoisson, rootn, round, rounddown, roundup, seriessum, sign, sqrt, sqrtpi, subtotal, sum, suma, sumif, sumsq, transpose, trunc
abs, ceil, ceiling, count, counta, countblank, countif, cur, div, eps, even, exp, fact, factdouble, fib, floor, gamma, gcd, g_product, int, inv, kproduct, lcm, ln, log, log10, log2, logn, max, maxa, mdeterm, min, mina, minverse, mmult, mod, mround, multinomial, multiply, munit, odd, pow, power, product, quotient, rand, randbernoulli, randbetween, randbinom, randexp, randnegbinom, randnorm, randpoisson, rootn, round, rounddown, roundup, seriessum, sign, sqrt, sqrtpi, subtotal, sum, suma, sumif, sumsq, transpose, truncname