Number of arrangements of n indistinguishable balls in n boxes with the maximum number of balls in any box equal to 3.
A180283
Number of arrangements of n indistinguishable balls in n boxes with the maximum number of balls in any box equal to 3.
Terms
- a(0) =3a(1) =12a(2) =50a(3) =195a(4) =735a(5) =2716a(6) =9912a(7) =35850a(8) =128865a(9) =461175a(10) =1645215a(11) =5855941a(12) =20810153a(13) =73870748a(14) =262029364a(15) =929031504a(16) =3293120337a(17) =11672207262a(18) =41373395052a(19) =146674116501a(20) =520093043437
External references
- oeis: A180283