43989

Appears in sequences

• Roman numerals for n evaluated as if in base 36.at n=29A073421
• The Wiener index of the Dutch windmill graph D(5,n) (n>=1).at n=42A180579
• Second smallest multiple of n whose digits sum to n.at n=32A245065
• a(1) = 1; a(n) = a(n-1) + 2 * a(floor(n/2)).at n=46A347027