OFFSET
1,2
LINKS
Amiram Eldar, Table of n, a(n) for n = 1..10000
FORMULA
MATHEMATICA
a[n_] := DivisorSigma[0, 2*Floor[3*n/2] - 1]; Array[a, 100]
PROG
(PARI) a(n) = numdiv((3*n)\2 << 1 - 1)
(Python)
from sympy import divisor_count
def A366441(n): return divisor_count((n+(n>>1)<<1)-1) # Chai Wah Wu, Oct 10 2023
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Amiram Eldar, Oct 10 2023
STATUS
approved