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 A214660 9*n^2 - 11*n + 3. 2
 1, 17, 51, 103, 173, 261, 367, 491, 633, 793, 971, 1167, 1381, 1613, 1863, 2131, 2417, 2721, 3043, 3383, 3741, 4117, 4511, 4923, 5353, 5801, 6267, 6751, 7253, 7773, 8311, 8867, 9441, 10033, 10643, 11271, 11917, 12581, 13263, 13963, 14681, 15417, 16171, 16943 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Central terms of triangle A214604. LINKS Index entries for linear recurrences with constant coefficients, signature (3,-3,1). PROG (Haskell) a214660 n = (9 * n - 11) * n + 3 (PARI) a(n)=9*n^2-11*n+3 \\ Charles R Greathouse IV, Jun 17 2017 CROSSREFS Cf. A214675. Sequence in context: A003124 A005570 A195037 * A258598 A223906 A146673 Adjacent sequences:  A214657 A214658 A214659 * A214661 A214662 A214663 KEYWORD nonn,easy AUTHOR Reinhard Zumkeller, Jul 25 2012 STATUS approved

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Last modified April 15 03:00 EDT 2021. Contains 342974 sequences. (Running on oeis4.)