#include <stdio.h>
#include <stdlib.h>

double f( double z, int k) {

    int kk = 2*k+1;
    double var = (-z*z)/((kk+2)*(kk+1));

    if (k==0) return z;
    else return (var*f(z, k-1));

}

int main (void) {

    double z;
    short i;

    printf("z: ");
    scanf("%lf", &z);
    printf("\n");

    for (i=0; i<15; i++) printf("za k=%d, z=%g\n", i, f(z, i));

    return 0;

}