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A173512 a(n) = 8*n + 4 + n mod 2. 2
4, 13, 20, 29, 36, 45, 52, 61, 68, 77, 84, 93, 100, 109, 116, 125, 132, 141, 148, 157, 164, 173, 180, 189, 196, 205, 212, 221, 228, 237, 244, 253, 260, 269, 276, 285, 292, 301, 308, 317, 324, 333, 340, 349, 356, 365, 372, 381, 388, 397, 404, 413, 420, 429, 436 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

COMMENTS

First differences of A173511;

a(n+1) - a(n) = A010729(n+1).

LINKS

Table of n, a(n) for n=0..54.

Index entries for linear recurrences with constant coefficients, signature (1, 1, -1).

FORMULA

G.f.: (4 + 9*x + 3*x^2)/((1 + x)*(1 - x)^2). - Philippe Deléham, Nov 29 2016

MATHEMATICA

LinearRecurrence[{1, 1, -1}, {4, 13, 20}, 60] (* Vincenzo Librandi, Nov 29 2016 *)

PROG

(MAGMA) [8*n+4+n mod 2: n in [0..60]]; // Vincenzo Librandi, Nov 29 2016

CROSSREFS

Sequence in context: A298489 A299182 A030744 * A295159 A298216 A299092

Adjacent sequences:  A173509 A173510 A173511 * A173513 A173514 A173515

KEYWORD

nonn

AUTHOR

Reinhard Zumkeller, Feb 20 2010

STATUS

approved

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Last modified December 8 22:49 EST 2021. Contains 349596 sequences. (Running on oeis4.)