1,2

Table of n, a(n) for n=1..26.

Henry Ernest Dudeney, Amusements in Mathematics, 1917. See problem 113, "The torn number".

a(n) = A248353(n)^2.

a(7)=88209 as (88+209)^2 = 297^2 = 88209.

Supersequence of A238237.

Sequence in context: A067521 A117686 A104113 * A256349 A202002 A249613

Adjacent sequences: A102763 A102764 A102765 * A102767 A102768 A102769

nonn,base

Bodo Zinser, Feb 10 2005

a(1)=1 prepended by Max Alekseyev, Aug 04 2017

approved