A376108 Non-Leonardo numbers.

2, 4, 6, 7, 8, 10, 11, 12, 13, 14, 16, 17, 18, 19, 20, 21, 22, 23, 24, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 68, 69, 70, 71, 72, 73, 74

Offset: 1

Author

Chai Wah Wu, Sep 10 2024

Keywords

• nonn
• easy

Comments

A299174 UNION A005408(A001690 - 1).

Crossrefs

Cf. A001595, A299174, A001690.

Programs

Python

def A376108(n):
    def f(x):
        a, b, c = 1, 1, n
        while True:
            if b > x: return c
            a, b = b, a+b+1
            c +=1
    m, k = n, f(n)
    while m != k: m, k = k, f(k)
    return m