A115550 Numbers k such that k^2 is the concatenation of two numbers m and 8*m.

18, 36, 168, 252, 336, 1668, 3336, 16668, 33336, 166668, 333336, 1666668, 3333336, 16666668, 22222224, 27777780, 33333336, 113149848, 114678900, 116207952, 117737004, 119266056, 120795108, 122324160, 123853212

Offset

1,1

Links

Table of n, a(n) for n=1..25.

Example

18^2 = 3_24.

Crossrefs

Cf. A102567, A106497, A115527 - A115556.

Sequence in context: A347889 A375679 A376437 * A061713 A198802 A041638

Adjacent sequences: A115547 A115548 A115549 * A115551 A115552 A115553

Keyword

nonn,base

Author

Giovanni Resta, Jan 25 2006

Status

approved