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%I #20 Dec 22 2023 15:32:09
%S 12,24,48,81,63,26,41,82,65,21,42,84,68,21,43,86,61,22,45,81,62,24,48,
%T 81,63,26,41,82,65,21,42,84,68,21,43,86,61,22,45,81,62,24,48,81,63,27,
%U 41,82,65,21,42,84,69,21,43,87,61,22,45,81,62,24,49,81,63,27,41,82,65,21,42,84,69,21,43,87,61,23,46,81
%N Comma transform of powers of 2.
%C See A367360 for further information.
%H Michael De Vlieger, <a href="/A367361/b367361.txt">Table of n, a(n) for n = 0..10000</a>
%F a(n) = 10 * A000689(n) + A008952(n+1). - _Alois P. Heinz_, Nov 22 2023
%t FromDigits /@ Partition[Rest@ Flatten[{First[#], Last[#]} & /@ IntegerDigits[2^Range[0, 120]]], 2, 2] (* _Michael De Vlieger_, Nov 22 2023 *)
%o (Python)
%o from itertools import count, islice, pairwise
%o def S(): yield from (str(2**i) for i in count(0))
%o def agen(): yield from (int(t[-1]+u[0]) for t, u in pairwise(S()))
%o print(list(islice(agen(), 80))) # _Michael S. Branicky_, Nov 22 2023
%o (Python)
%o def A367361(n): return (60,20,40,80)[n&3]+int(str(1<<n+1)[0]) if n else 12 # _Chai Wah Wu_, Dec 22 2023
%Y Cf. A000079, A000689, A008952, A166499, A367360.
%K nonn,base
%O 0,1
%A _N. J. A. Sloane_, Nov 22 2023
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