A393079 - OEIS

%I #23 Feb 12 2026 14:18:49

%S 0,0,0,2,0,6,1,9,0,14,9,25,0,20,13,35,0,30,25,57,11,47,40,78,0,44,37,

%T 83,19,69,60,112,0,62,57,121,43,111,104,174,7,83,76,154,58,140,131,

%U 215,0,92,85,179,67,165,156,256,23,129,120,228,98,210,199,313

%N First column of A392806.

%C See also A392806 for a Python program.

%H A.H.M. Smeets, <a href="/A393079/b393079.txt">Table of n, a(n) for n = 0..10000</a>

%F a(2^k) = 0, k >= 0.

%F a(2*n+1) = a(2*n) + 2*Sum_{i = 1..n} A001511(i) = a(2*n) + 2*A005187(n).

%F a(5^(e+1)*n + 2^e) = a(2^(e+1)*n) + max(0,-A392083(e)+2^(e+1)*Sum_{i=1..n} A005187(i), e >= 0, a(0) = 0 (completely determines this sequence).

%F a(n) = A007814(A392805(n)).

%Y Cf. A001511, A005187, A007814, A392083, A392806.

%K nonn

%O 0,4

%A _A.H.M. Smeets_, Feb 01 2026