A342279 A bisection of A000201: a(n) = A000201(2*n+1).

1, 4, 8, 11, 14, 17, 21, 24, 27, 30, 33, 37, 40, 43, 46, 50, 53, 56, 59, 63, 66, 69, 72, 76, 79, 82, 85, 88, 92, 95, 98, 101, 105, 108, 111, 114, 118, 121, 124, 127, 131, 134, 137, 140, 144, 147, 150, 153, 156, 160, 163, 166, 169, 173, 176, 179, 182, 186, 189

Offset: 0

Author

N. J. A. Sloane, Mar 16 2021

Keywords

• nonn

Links

• N. J. A. Sloane, Families of Essentially Identical Sequences, Mar 24 2021 (Includes this sequence)

Crossrefs

Cf. A000201, A276854.

Programs

Python

import math
phi = (1 + math.sqrt(5))/2
for n in range(101):
    print(int(math.floor((2*n)+ 1) * phi), end=',')
# Alvin Hoover Belt, Mar 17 2021

Python

from math import isqrt
def A342279(n): return ((m:=(n<<1)+1)+isqrt(5*m**2)>>1) # Chai Wah Wu, Aug 10 2022