a(n) is the number of terms in the expansion of (x+y+z)*(x^2+y^2+z^2)*(x^3+y^3+z^3)*...*(x^n+y^n+z^n).
A086796
a(n) is the number of terms in the expansion of (x+y+z)*(x^2+y^2+z^2)*(x^3+y^3+z^3)*...*(x^n+y^n+z^n).
Terms
- a(0) =3a(1) =9a(2) =24a(3) =60a(4) =130a(5) =247a(6) =429a(7) =697a(8) =1075a(9) =1590a(10) =2272a(11) =3154a(12) =4272a(13) =5665a(14) =7375a(15) =9447a(16) =11929a(17) =14872a(18) =18330a(19) =22360a(20) =27022a(21) =32379a(22) =38497a(23) =45445a(24) =53295a(25) =62122a(26) =72004a(27) =83022a(28) =95260a(29) =108805
External references
- oeis: A086796