OFFSET
1,1
REFERENCES
Published in Snark, Feb 27 2001.
FORMULA
a(n) = n*A011762(n). - Michel Marcus, Nov 14 2023
EXAMPLE
a(1) is 3 because UNO has 3 letters by 1 = 3.
a(2) is 6 because DOS has 3 letters by 2 = 6.
a(3) is 12 because TRES has 4 letters by 3 = 12.
a(4) is 24 because CUATRO has 6 letters by 4 = 24.
a(5) is 25 because CINCO has 5 letters by 5 = 25.
CROSSREFS
KEYWORD
nonn,word
AUTHOR
Rodolfo Kurchan, Feb 12 2010
EXTENSIONS
More terms from Michel Marcus, Nov 14 2023
STATUS
approved