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

1,1

Comments

A299174 UNION A005408(A001690 - 1).

Links

Table of n, a(n) for n=1..66.

Prog

(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

Crossrefs

Cf. A001595, A299174, A001690.

Sequence in context: A014530 A268445 A053663 * A324561 A288258 A075313

Adjacent sequences: A376105 A376106 A376107 * A376109 A376110 A376111

Keyword

nonn,easy

Author

Chai Wah Wu, Sep 10 2024

Status

approved