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a(n) = 8*n^2 - 9*n + 3.
1

%I #12 Feb 09 2023 22:29:30

%S 2,17,48,95,158,237,332,443,570,713,872,1047,1238,1445,1668,1907,2162,

%T 2433,2720,3023,3342,3677,4028,4395,4778,5177,5592,6023,6470,6933,

%U 7412,7907,8418,8945,9488

%N a(n) = 8*n^2 - 9*n + 3.

%C This is one of the four quadratic sequences that, interleaved, yield A360418.

%H <a href="/index/Rec#order_03">Index entries for linear recurrences with constant coefficients</a>, signature (3,-3,1).

%F a(n) = 8*n^2 - 9*n + 3.

%t Table[8*n^2 - 9*n + 3, {n, 1, 100}]

%Y Cf. A360418.

%K nonn,easy

%O 1,1

%A _James Propp_, Feb 06 2023