A157466 Numbers of numbers <= n, that are squares when inserting at most one digit in decimal representation (see A157465).

1, 2, 3, 4, 5, 6, 7, 7, 8, 9, 10, 11, 12, 12, 13, 13, 14, 14, 14, 15, 15, 16, 17, 17, 18, 19, 20, 20, 21, 22, 22, 23, 24, 24, 25, 25, 26, 26, 26, 26, 27, 28, 28, 28, 29, 29, 29, 29, 30, 31, 31, 31, 32, 32, 32, 32, 33, 34, 34, 35, 35, 36, 37, 37, 38, 39, 40, 41, 41, 42, 42, 42, 43

Offset: 0

Author

Reinhard Zumkeller, Mar 01 2009

Keywords

• base
• nonn

Comments

a(n) > n/2 for n <= 131;

a(n) <= n/2 for n > 131;

a(n) <= a(n+1); a(n)/n --> 0 for n --> oo;

a(A157465(n+1)) = a(A157465(n)) + 1.

Links

• R. Zumkeller, Table of n, a(n) for n = 0..10000

Crossrefs

A003059, A000196, A157464.