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A014368 a(n) = bc, where n = C(b,2)+C(c,1), b>c>=0. 1

%I

%S 20,21,30,31,32,40,41,42,43,50,51,52,53,54,60,61,62,63,64,65,70,71,72,

%T 73,74,75,76,80,81,82,83,84,85,86,87,90,91,92,93,94,95,96,97,98,100,

%U 101,102,103,104,105,106

%N a(n) = bc, where n = C(b,2)+C(c,1), b>c>=0.

%D W. Bruns and J. Herzog, Cohen-Macaulay Rings, Cambridge, 1993, p. 158.

%K nonn,easy

%O 1,1

%A _N. J. A. Sloane_.

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Last modified July 30 07:18 EDT 2021. Contains 346348 sequences. (Running on oeis4.)