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a(n) = 2*A006068(n); main diagonal of A268714.
4

%I #24 Apr 25 2024 01:06:23

%S 0,2,6,4,14,12,8,10,30,28,24,26,16,18,22,20,62,60,56,58,48,50,54,52,

%T 32,34,38,36,46,44,40,42,126,124,120,122,112,114,118,116,96,98,102,

%U 100,110,108,104,106,64,66,70,68,78,76,72,74,94,92,88,90,80,82,86,84,254,252,248,250,240,242,246,244,224,226

%N a(n) = 2*A006068(n); main diagonal of A268714.

%H Antti Karttunen, <a href="/A268716/b268716.txt">Table of n, a(n) for n = 0..8191</a>

%F a(n) = 2*A006068(n).

%F a(n) = A006068(A001969(n+1)).

%F a(n) = A268714(n,n).

%o (Scheme) (define (A268716 n) (* 2 (A006068 n)))

%o (Python)

%o def A268716(n):

%o k, m = n, n>>1

%o while m > 0:

%o k ^= m

%o m >>= 1

%o return k<<1 # _Chai Wah Wu_, Jun 30 2022

%Y Cf. A001969, A006068.

%Y Main diagonal of array A268714.

%Y Row 3 and column 3 of array A268724.

%K nonn

%O 0,2

%A _Antti Karttunen_, Feb 12 2016