This site is supported by donations to The OEIS Foundation.

 Annual appeal: Please make a donation to keep the OEIS running! Over 6000 articles have referenced us, often saying "we discovered this result with the help of the OEIS". Other ways to donate

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A103177 (7*3^n + 2n + 5)/4. 0
 3, 7, 18, 50, 145, 429, 1280, 3832, 11487, 34451, 103342, 310014, 930029, 2790073, 8370204, 25110596, 75331771, 225995295, 677985866, 2033957578, 6101872713, 18305618117, 54916854328, 164750562960, 494251688855, 1482755066539 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,1 COMMENTS A floretion-generated sequence relating sequences A007051 and A047926. (a(n)) results from a force transform of the sequence of powers of 3. LINKS Index entries for linear recurrences with constant coefficients, signature (5,-7,3). FORMULA a(n) = 2*A007051(n) + A047926(n). a(n) = 5*a(n-1)-7*a(n-2)+3*a(n-3). G.f.: (3-2*x)*(1-2*x)/((1-x)^2*(1-3*x)). [Colin Barker, Aug 28 2012] MATHEMATICA Table[(7*3^n+2*n+5)/4, {n, 0, 25}]  (* Harvey P. Dale, Feb 23 2011 *) PROG Floretion Algebra Multiplication Program, FAMP Code: 4jesleftforseq[A*B] with A = - .25'i - .25i' - .25'ii' + .25'jj' + .25'kk' + .25'jk' + .25'kj' - .25e and B = + 'i + .5j' + .5k' + .5'ij' + .5'ik', 1vesforseq[A*B](n) = 3^(n+1), ForType: 1A. CROSSREFS Cf. A007051, A047926. Sequence in context: A218250 A267799 A218783 * A262784 A202261 A180166 Adjacent sequences:  A103174 A103175 A103176 * A103178 A103179 A103180 KEYWORD nonn,easy AUTHOR Creighton Dement, Mar 17 2005 EXTENSIONS More terms from Harvey P. Dale, Feb 23 2011 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 | More pages
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified November 23 20:23 EST 2017. Contains 295141 sequences.