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!)
 A145138 Main diagonal of square array A145153. 2
 0, 1, 2, 6, 20, 71, 259, 960, 3597, 13586, 51635, 197223, 756380, 2910707, 11233311, 43460144, 168502849, 654547456, 2546819347, 9924285801, 38723794820, 151278566731, 591628491483, 2316065644414, 9074988880769, 35587925333525, 139666503235814, 548516611541343 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,3 LINKS Alois P. Heinz, Table of n, a(n) for n = 0..1000 FORMULA a(n) = [x^n] x/((1-x-x^4)*(1-x)^(n-1)). MAPLE a:= n-> coeftayl(x/(1-x-x^4)/(1-x)^(n-1), x=0, n): seq(a(n), n=0..30); # second Maple program: a:= proc(n) option remember; `if`(n<5, n*(n+1)*(n^2-4*n+6)/6,        a(n-4)+(2*(35*n^3-207*n^2+310*n-78)*a(n-1)-(203*n^3        -1244*n^2+1891*n-130)*a(n-2)+(2*n-7)*(7*n-19)*n*        (10*a(n-3)-2*a(n-5)))/((7*n-26)*(n-1)^2))     end: seq(a(n), n=0..30);  # Alois P. Heinz, Aug 18 2019 CROSSREFS Cf. A145153, A000004, A000012, A001477, A000217, A000292, A145126, A145127, A145128, A145129, A145130, A017898, A003269, A098578, A145131, A145132, A145133, A145134, A145135, A145136, A145137. Sequence in context: A150127 A151286 A047126 * A000707 A129777 A108600 Adjacent sequences:  A145135 A145136 A145137 * A145139 A145140 A145141 KEYWORD nonn AUTHOR Alois P. Heinz, Oct 03 2008 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 May 7 20:36 EDT 2021. Contains 343652 sequences. (Running on oeis4.)