The recursive function is the same concept as the ignition equation that describes only the relationship between the nth term and the n-1 term.

The ignition equation of the ordinal sequence is

```
A(n) = A(n-1) + d
```

It's this.

You can use this as a recursive function.

```
def A(n):
return A(n-1) + d
```

But there's something missing from the definition of an ordinal sequence. The initial term `A(0) = A_0`

. The recursive function requires the same thing.

```
def A(n):
if n == 0:
return A_0
return A(n-1) + d
```

This is a general expression, and the values of A_0, d must be given explicitly to define which ordinal sequence it is. `A(n) = 3n + 2`

If A_0 is 2, d is 3, and the definition of the recursive function is

```
def A(n):
if n == 0:
return 2
return A(n-1) + 3
```

I'll be like this.

Because using the general expression of an ordinal sequence is much more computationally beneficial, no one would define it as a recursive function, but it's conceptually like this.

The Fibonacci recursive function is also easily understood when compared to the Fibonacci igniter.

2022-09-20 15:50

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