20180160

Appears in sequences

• a(1) = 5, a(n) = sigma(a(n-1)).at n=16A051572
• Triangle read by rows: T(n,d) = (n!/d!)*(n+1)*binomial(2n-d+1,n+1)/(n-d+1) (0 <= d <= n).at n=39A123225
• Triangle of unsigned 4-Lah numbers.at n=39A143499
• Numbers that occur exactly 5 times in A036038, i.e., numbers m such that the multinomial coefficient (x_1 + ... + x_k)!/(x_1! * ... * x_k!) is equal to m for exactly 5 integer partitions (x_1, ..., x_k).at n=17A376375