The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A047535 Numbers that are congruent to {4, 7} mod 8. 17
 4, 7, 12, 15, 20, 23, 28, 31, 36, 39, 44, 47, 52, 55, 60, 63, 68, 71, 76, 79, 84, 87, 92, 95, 100, 103, 108, 111, 116, 119, 124, 127, 132, 135, 140, 143, 148, 151, 156, 159, 164, 167, 172, 175, 180, 183, 188, 191, 196, 199, 204, 207, 212, 215, 220, 223, 228, 231 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Union of A004771 and A017113. LINKS Index entries for linear recurrences with constant coefficients, signature (1,1,-1). FORMULA a(n) = 8*n - a(n-1) - 5 (with a(1)=4). - Vincenzo Librandi, Aug 06 2010 a(n) = 4*n -(1 + (-1)^n)/2. - Arkadiusz Wesolowski, Sep 18 2012 G.f.: x*(4+3*x+x^2) / ( (1+x)*(x-1)^2 ). - R. J. Mathar, Jul 10 2015 From Franck Maminirina Ramaharo, Jul 22 2018: (Start) a(n) = A047470(n) + 4. E.g.f.: (2 - exp(-x) + (8*x - 1)*exp(x))/2. (End) MAPLE A047535:=n->4*n - (1 + (-1)^n)/2; seq(A047535(n), n=1..100); # Wesley Ivan Hurt, Feb 24 2014 MATHEMATICA Table[4n - (1 + (-1)^n)/2, {n, 100}] (* Wesley Ivan Hurt, Feb 24 2014 *) PROG (Maxima) makelist(4*n - (1 + (-1)^n)/2, n, 1, 100); /* Franck Maminirina Ramaharo, Jul 22 2018 */ CROSSREFS Cf. A047398, A047461, A047452, A047470, A047524, A047615, A047617. Sequence in context: A026360 A237514 A276888 * A310773 A310774 A182989 Adjacent sequences:  A047532 A047533 A047534 * A047536 A047537 A047538 KEYWORD nonn,easy AUTHOR STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified April 17 02:26 EDT 2021. Contains 343059 sequences. (Running on oeis4.)