A242426 a(n) = floor(n! / n^3).
1, 0, 0, 0, 0, 3, 14, 78, 497, 3628, 29990, 277200, 2834328, 31770514, 387459072, 5108103000, 72397196844, 1097800704000, 17735107218083, 304112751022080, 5516784599040000, 105559797875432727, 2124765080865042873, 44881973505008640000, 992717442773183102976
Offset: 1
Keywords
Programs
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Python
import math for i in range(1,32): print(math.factorial(i)//(i**3), end=', ')
Extensions
Formula corrected by David Radcliffe, Aug 07 2025