Fifth diagonal (m=4) of triangle A084938; a(n) = A084938(n+4,n) = (n^4 + 18*n^3 + 131*n^2 + 426*n)/24.
A090386
Fifth diagonal (m=4) of triangle A084938; a(n) = A084938(n+4,n) = (n^4 + 18*n^3 + 131*n^2 + 426*n)/24.
Terms
- a(0) =0a(1) =24a(2) =64a(3) =126a(4) =217a(5) =345a(6) =519a(7) =749a(8) =1046a(9) =1422a(10) =1890a(11) =2464a(12) =3159a(13) =3991a(14) =4977a(15) =6135a(16) =7484a(17) =9044a(18) =10836a(19) =12882a(20) =15205a(21) =17829a(22) =20779a(23) =24081a(24) =27762a(25) =31850a(26) =36374a(27) =41364a(28) =46851a(29) =52867
External references
- oeis: A090386