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Link: http://codepad.org/hGc5MwTM    [ raw code | output | fork ]

C, pasted on Jul 16:
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#include <stdio.h>

void
kakutani(int n)
{
  printf("%d ", n);
  if (n != 1)
    n % 2 ? kakutani(n * 3 + 1) : kakutani(n / 2);
}

int
main()
{
  int             n;
  printf("2以上の自然数を入力してください\n");
  scanf("%d", &n);
  kakutani(n);
  return 0;
}


Output:
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2以上の自然数を入力してください
134513601 403540804 201770402 100885201 302655604 151327802 75663901 226991704 113495852 56747926 28373963 85121890 42560945 127682836 63841418 31920709 95762128 47881064 23940532 11970266 5985133 17955400 8977700 4488850 2244425 6733276 3366638 1683319 5049958 2524979 7574938 3787469 11362408 5681204 2840602 1420301 4260904 2130452 1065226 532613 1597840 798920 399460 199730 99865 299596 149798 74899 224698 112349 337048 168524 84262 42131 126394 63197 189592 94796 47398 23699 71098 35549 106648 53324 26662 13331 39994 19997 59992 29996 14998 7499 22498 11249 33748 16874 8437 25312 12656 6328 3164 1582 791 2374 1187 3562 1781 5344 2672 1336 668 334 167 502 251 754 377 1132 566 283 850 425 1276 638 319 958 479 1438 719 2158 1079 3238 1619 4858 2429 7288 3644 1822 911 2734 1367 4102 2051 6154 3077 9232 4616 2308 1154 577 1732 866 433 1300 650 325 976 488 244 122 61 184 92 46 23 70 35 106 53 160 80 40 20 10 5 16 8 4 2 1 


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