1,1

Table of n, a(n) for n=1..72.

a(n) = A005589(A000290(n)). - Michel Marcus, Jun 21 2013

a(14)=19 because 14^2=196, which can be written out as 'one-hundred-ninety-six' which has 19 letters.

Cf. A000290.

Sequence in context: A231219 A231343 A121924 * A241740 A225738 A186679

Adjacent sequences: A094945 A094946 A094947 * A094949 A094950 A094951

easy,nonn,word

Gregory S. Thoman (fealuinix(AT)yahoo.com), May 26 2004

More terms from Kristen Loughman (kloughma(AT)ashland.edu), Jan 26 2006

approved