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If k appears so do 2k-2 and 3k-3. (duplicates omitted.)
(Formerly M3275)
3

%I M3275 #32 Feb 29 2024 10:49:25

%S 4,6,9,10,15,16,18,24,27,28,30,34,42,45,46,51,52,54,58,66,69,78,81,82,

%T 87,88,90,99,100,102,106,114,123,130,132,135,136,150,153,154,159,160,

%U 162,171,172,174,178,195,196,198,202,204,210,226,231,240,243,244,258

%N If k appears so do 2k-2 and 3k-3. (duplicates omitted.)

%D N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).

%H Seiichi Manyama, <a href="/A005659/b005659.txt">Table of n, a(n) for n = 1..10000</a>

%H R. K. Guy, <a href="/A005658/a005658.pdf">Letter to N. J. A. Sloane with attachment, 1982</a>

%e From _Seiichi Manyama_, Feb 29 2024: (Start)

%e 87, 130 and 258 are terms and 258 = 2*130 - 2 = 3*87 - 3.

%e 135, 202 and 402 are terms and 402 = 2*202 - 2 = 3*135 - 3.

%e 231, 346 and 690 are terms and 690 = 2*346 - 2 = 3*231 - 3. (End)

%Y Cf. A005661.

%K nonn,easy

%O 1,1

%A _N. J. A. Sloane_

%E More terms from Larry Reeves (larryr(AT)acm.org), Oct 01 2001