nbonacci sequence (nボナッチ数列)の計算及び出力のためのPython3のコード例。

nbonacci.py

#!/usr/bin/env python3
#
# See https://sidestory.pandanote.info/nbonacci.html for details.
#

import sys
import re

if (len(sys.argv) < 3 or re.match(r'^[1-9]\d*$',sys.argv[1]) == None or re.match(r'^[1-9]\d*$',sys.argv[2]) == None):
    print("Usage: nbonacci.py <number of terms to compute the next term> <number of terms to calculate>")
    sys.exit(1)

ac = int(sys.argv[1])
an = int(sys.argv[2])
a = [0] * (ac-1)
a.append(1)

i = 0

while (i < an):
    if i < ac:
        print("{0:d}".format(a[i]))
    else:
        next = sum(a)
        print("{0:d}".format(next))
        a.pop(0)
        a.append(next)
    i += 1