OFFSET
0,4
FORMULA
a(n) = Sum_{k=1..n-1} k * A344437(n,k).
EXAMPLE
a(4) = 16 = 2 + 1 + 2 + 2 + 2 + 1 + 3 + 2 + 1: 2(1)4(3), 234(1), 24(1)(3), 3(1)4(2), 34(1)(2), 342(1), 4(1)(2)(3), 43(1)(2), 432(1).
CROSSREFS
KEYWORD
nonn
AUTHOR
Alois P. Heinz, May 19 2021
STATUS
approved