1 | initial version |

I am not sure about you resuest, is the following sufficient for you ?

```
sage: Gamma = lambda n: sum(gamma^i/factorial(i) for i in range(n))
sage: Gamma(2)
[ 1 sum(z^i*f(i), i, 1, n)]
[sum(z^i*g(i), i, 1, n) 1]
sage: Gamma(3)
[1/2*sum(z^i*f(i), i, 1, n)*sum(z^i*g(i), i, 1, n) + 1 sum(z^i*f(i), i, 1, n)]
[ sum(z^i*g(i), i, 1, n) 1/2*sum(z^i*f(i), i, 1, n)*sum(z^i*g(i), i, 1, n) + 1]
```

2 | No.2 Revision |

I am not sure about ~~you resuest, ~~your request, is the following sufficient for you ?

```
sage: Gamma = lambda n: sum(gamma^i/factorial(i) for i in range(n))
sage: Gamma(2)
[ 1 sum(z^i*f(i), i, 1, n)]
[sum(z^i*g(i), i, 1, n) 1]
sage: Gamma(3)
[1/2*sum(z^i*f(i), i, 1, n)*sum(z^i*g(i), i, 1, n) + 1 sum(z^i*f(i), i, 1, n)]
[ sum(z^i*g(i), i, 1, n) 1/2*sum(z^i*f(i), i, 1, n)*sum(z^i*g(i), i, 1, n) + 1]
```

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