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

0,2

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.

Sequence in context: A095703 A101041 A093697 * A194260 A227394 A209900

Adjacent sequences: A157463 A157464 A157465 * A157467 A157468 A157469

Keyword

base,nonn

Author

Reinhard Zumkeller, Mar 01 2009

Status

approved