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"Sloping octal numbers": write numbers in octal under each other (right-justified), read diagonals in upward direction, convert to decimal.
8

%I #15 Sep 10 2019 14:16:42

%S 0,1,2,3,4,5,6,15,8,9,10,11,12,13,14,23,16,17,18,19,20,21,22,31,24,25,

%T 26,27,28,29,30,39,32,33,34,35,36,37,38,47,40,41,42,43,44,45,46,55,48,

%U 49,50,51,52,53,54,63,56,57,58,59,60,61,126,71,64,65,66,67,68,69,70,79

%N "Sloping octal numbers": write numbers in octal under each other (right-justified), read diagonals in upward direction, convert to decimal.

%H Seiichi Manyama, <a href="/A325805/b325805.txt">Table of n, a(n) for n = 0..10000</a>

%H Wikipedia, <a href="https://en.wikipedia.org/wiki/Octal">Octal</a>

%Y Cf. A102370 (base 2), A109681 (base 3), A325644 (base 4), A325645 (base 5), A325692 (base 6), A325693 (base 7), this sequence (base 8), A325829 (base 9), A103205 (base 10).

%K nonn,base

%O 0,3

%A _Seiichi Manyama_, Sep 07 2019