a(n) = (n+1)*(n^2 +8*n +6)/6. Number of n-dimensional partitions of 4. Number of terms in 4th derivative of a function composed with itself n times.
A008778
a(n) = (n+1)*(n^2 +8*n +6)/6. Number of n-dimensional partitions of 4. Number of terms in 4th derivative of a function composed with itself n times.
Terms
- a(0) =1a(1) =5a(2) =13a(3) =26a(4) =45a(5) =71a(6) =105a(7) =148a(8) =201a(9) =265a(10) =341a(11) =430a(12) =533a(13) =651a(14) =785a(15) =936a(16) =1105a(17) =1293a(18) =1501a(19) =1730a(20) =1981a(21) =2255a(22) =2553a(23) =2876a(24) =3225a(25) =3601a(26) =4005a(27) =4438a(28) =4901a(29) =5395
External references
- oeis: A008778