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

Thanks to everyone who made a donation during our annual appeal!
To see the list of donors, or make a donation, see the OEIS Foundation home page.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A027116 a(n) = A027113(n, n+3). 0
 7, 23, 56, 120, 241, 467, 886, 1660, 3087, 5715, 10552, 19452, 35825, 65943, 121342, 223240, 410663, 755391, 1389448, 2555664, 4700673, 8645963, 15902486, 29249316, 53797967, 98949979, 181997480, 334745652, 615693345 (list; graph; refs; listen; history; text; internal format)
 OFFSET 3,1 LINKS FORMULA Conjectures from Colin Barker, Feb 20 2016: (Start) a(n) = 3*a(n-1)-2*a(n-2)-a(n-4)+a(n-5) for n>7. G.f.: x^3*(7+2*x+x^2-2*x^3) / ((1-x)^2*(1-x-x^2-x^3)). (End) CROSSREFS Sequence in context: A261893 A022815 A172252 * A151718 A027918 A058195 Adjacent sequences:  A027113 A027114 A027115 * A027117 A027118 A027119 KEYWORD nonn 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 January 19 20:41 EST 2020. Contains 331066 sequences. (Running on oeis4.)