OFFSET
0,3
FORMULA
a(n) = Sum_{k=2..n+2} (k^(n-k+2) - 1)/(k - 1).
a(n) ~ A026898(n).
a(n) = Sum_{k=0..n} k * A104878(n,k). - Alois P. Heinz, Dec 05 2023
MATHEMATICA
CROSSREFS
KEYWORD
nonn
AUTHOR
Stefano Spezia, Mar 13 2023
STATUS
approved