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!)
 A192146 1-sequence of reduction of pentagonal numbers sequence by x^2 -> x+1. 1
 0, 5, 17, 61, 166, 421, 981, 2177, 4634, 9564, 19244, 37934, 73502, 140373, 264783, 494143, 913618, 1675387, 3050075, 5516865, 9920880, 17747270, 31597272, 56013036, 98903436, 174003461, 305107901, 533345617, 929655934, 1616151649 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS See A192232 for definition of "k-sequence of reduction of [sequence] by [substitution]". LINKS FORMULA Empirical G.f.: x^2*(5-3*x+8*x^2-2*x^3)/(1-x)/(1-x-x^2)^3. [Colin Barker, Feb 11 2012] MATHEMATICA (See A192145.) CROSSREFS Cf. A192232, A192145. Sequence in context: A026619 A142956 A273422 * A273607 A007483 A273503 Adjacent sequences:  A192143 A192144 A192145 * A192147 A192148 A192149 KEYWORD nonn AUTHOR Clark Kimberling, Jun 27 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
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified April 4 21:43 EDT 2020. Contains 333238 sequences. (Running on oeis4.)