`scipy.special._basic:euler`

Signature

def euler ( n )

Euler numbers E(0), E(1), ..., E(n).

The Euler numbers ^[1] are also known as the secant numbers.

Because euler(n) returns floating point values, it does not give exact values for large n. The first inexact value is E(22).

: ndarray: The Euler numbers [E(0), E(1), ..., E(n)]. The odd Euler numbers, which are all zero, are included.

import numpy as np
from scipy.special import euler
euler(6)

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euler(13).astype(np.int64)

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euler(22)[-1]  # Exact value of E(22) is -69348874393137901.

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