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 A191634 a(n) = floor((1 + 3^n)/(1 + 3*n)). 3
 1, 1, 2, 6, 15, 38, 99, 262, 703, 1904, 5210, 14363, 39858, 111231, 311932, 878504, 2483464, 7044008, 20038990, 57160400, 163443018, 468374024, 1344902554, 3868897760, 11148534334, 32175516814, 92995091280, 269138734764, 779890651873, 2262539913128 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,3 LINKS Vincenzo Librandi, Table of n, a(n) for n = 1..600 MATHEMATICA f[n_] := Floor[(1 + 3^n)/(3 n + 1)] Table[f[n], {n, 1, 40}]    (* A191634 *) PROG (PARI) a(n)=(3^n+1)\(3*n+1) \\ Charles R Greathouse IV, Jun 17 2011 (Maxima) A191634(n):=floor( (1+3^n)/(1+3*n) )\$ makelist(A191634(n), n, 1, 30); /* Martin Ettl, Oct 25 2012 */ CROSSREFS Cf. A016777, A034472. Cf. A191627. Sequence in context: A106515 A153122 A109545 * A120846 A101522 A094969 Adjacent sequences:  A191631 A191632 A191633 * A191635 A191636 A191637 KEYWORD nonn,easy AUTHOR Clark Kimberling, Jun 09 2011 STATUS approved

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Last modified February 28 23:08 EST 2020. Contains 332351 sequences. (Running on oeis4.)