A368361 - OEIS

%I #14 Jan 16 2024 16:17:05

%S 13,35,57,79,91,11,31,51,71,92,12,32,52,72,93,13,33,53,73,94,14,34,54,

%T 74,95,15,35,55,75,96,16,36,56,76,97,17,37,57,77,98,18,38,58,78,99,19,

%U 39,59,79,91,11,31,51,71,91,11,31,51,71,91,11,31,51,71,91,11,31,51,71,91,11,31,51,71,91,11,31,51,71,91

%N Comma transform of the odd numbers.

%C See A367360 for further information.

%H Alois P. Heinz, <a href="/A368361/b368361.txt">Table of n, a(n) for n = 0..10000</a>

%p a:= n-> parse(cat(""||(2*n+1)[-1], ""||(2*n+3)[1])):

%p seq(a(n), n=0..79);  # _Alois P. Heinz_, Jan 03 2024

%o (Python)

%o def A368361(n): return (10,30,50,70,90)[n%5]+int(str((n<<1)+3)[0]) # _Chai Wah Wu_, Jan 03 2024

%Y Cf. A005408, A367360.

%K nonn,base

%O 0,1

%A _N. J. A. Sloane_, Jan 02 2024