Triangle read by rows: T(m,n) = number of ways of distributing n distinguishable balls into m distinguishable bins of size 4 where empty bins are permitted (m >= 1, 1 <= n <= 4m).
A248846
Triangle read by rows: T(m,n) = number of ways of distributing n distinguishable balls into m distinguishable bins of size 4 where empty bins are permitted (m >= 1, 1 <= n <= 4m).
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =2a(5) =4a(6) =8a(7) =16a(8) =30a(9) =50a(10) =70a(11) =70a(12) =3a(13) =9a(14) =27a(15) =81a(16) =240a(17) =690a(18) =1890a(19) =4830a(20) =11130a(21) =22050a(22) =34650a(23) =34650a(24) =4a(25) =16a(26) =64a(27) =256a(28) =1020a(29) =4020
External references
- oeis: A248846