Expansion of -x/((x^2+x+1)*(x^2+3*x+1)); invert transform gives signed version of tetrahedral numbers A000292.
A113067
Expansion of -x/((x^2+x+1)*(x^2+3*x+1)); invert transform gives signed version of tetrahedral numbers A000292.
Terms
- a(0) =0a(1) =-1a(2) =4a(3) =-11a(4) =28a(5) =-72a(6) =188a(7) =-493a(8) =1292a(9) =-3383a(10) =8856a(11) =-23184a(12) =60696a(13) =-158905a(14) =416020a(15) =-1089155a(16) =2851444a(17) =-7465176a(18) =19544084a(19) =-51167077a(20) =133957148a(21) =-350704367a(22) =918155952a(23) =-2403763488a(24) =6293134512a(25) =-16475640049a(26) =43133785636a(27) =-112925716859a(28) =295643364940a(29) =-774004377960
External references
- oeis: A113067