a(n) = Sum_{i_1=0..4} Sum_{i_2=0..4} ... Sum_{i_n=0..4} multinomial(i_1 + i_2 + ... + i_n; i_1, i_2, ..., i_n).
A308295
a(n) = Sum_{i_1=0..4} Sum_{i_2=0..4} ... Sum_{i_n=0..4} multinomial(i_1 + i_2 + ... + i_n; i_1, i_2, ..., i_n).
Terms
- a(0) =1a(1) =5a(2) =251a(3) =110251a(4) =191448941a(5) =904434761801
External references
- oeis: A308295