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A169896 Irregular triangle read by rows in which row n (n>=1) lists distinct carryless divisors i of in range 1 <= i <= n. 0

%I

%S 1,1,2,1,3,1,2,4,1,3,5,5,5,1,2,3,4,6,6,1,7,1,2,3,4,4,6,6,7,8,8,1,3,7,

%T 9,1,10,1,11,1,12,1,13,1,14,1,15,1,16,1,17,1,18,1,19,1,2,2,6,10,15,20,

%U 20,1,21,1,2,2,6,11,16,22,22,1,23,1,2,2,6,12,17,24,24,1,25,1,2,2,6,6,13,18

%N Irregular triangle read by rows in which row n (n>=1) lists distinct carryless divisors i of in range 1 <= i <= n.

%H <a href="/index/Ca#CARRYLESS">Index entries for sequences related to carryless arithmetic</a>

%e Triangle begins:

%e 1,

%e 1, 2,

%e 1, 3,

%e 1, 2, 4,

%e 1, 3, 5,

%e 1, 2, 3, 4, 6,

%e 1, 7,

%e 1, 2, 3, 4, 6, 7, 8,

%e 1, 3, 7, 9,

%e 1, 10,

%e 1, 11,

%e 1, 12,

%e 1, 13,

%e 1, 14,

%e 1, 15,

%e 1, 16,

%e 1, 17,

%e 1, 18,

%e 1, 19,

%e 1, 2, 6, 10, 15, 20,

%e 1, 21,

%e 1, 2, 6, 11, 16, 22,

%e ...

%K nonn,tabf,base

%O 1,3

%A _David Applegate_, _Marc LeBrun_ and _N. J. A. Sloane_, Jul 11 2010

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Last modified September 28 08:23 EDT 2020. Contains 337394 sequences. (Running on oeis4.)