Revision history [back]
 | 1 | initial version |
One quick(ly found) possibility would be to import factorial2 from sympy, sample code:
sage: factorial2(99)
2725392139750729502980713245400918633290796330545803413734328823443106201171875
sage: factorial(100) / factorial(50) / 2^50
2725392139750729502980713245400918633290796330545803413734328823443106201171875
sage: ?factorial2
Note that factorial2 is defined for both odd and even natural numbers. (Also for negative odd ones.)
| | 2 | No.2 Revision |
One quick(ly found) possibility would be to import factorial2 from sympy, sample code:
sage: from sympy import factorial2
sage: factorial2(99)
2725392139750729502980713245400918633290796330545803413734328823443106201171875
sage: factorial(100) / factorial(50) / 2^50
2725392139750729502980713245400918633290796330545803413734328823443106201171875
sage: ?factorial2
Note that factorial2 is defined for both odd and even natural numbers. (Also for negative odd ones.)
