A116317 Numbers k such that k*(k+4) gives the concatenation of two numbers m and m+4.

7745, 8019, 33294316, 66705681, 98000199, 340465755423, 476452552743, 523547447254, 659534244574, 866013200679, 998000001999, 3695104677080132, 3755782995538766, 4198081170077529, 4803478892324964, 5196521107675033

Offset

1,1

Links

Table of n, a(n) for n=1..16.

Example

98000199 * 98000203 = 96040393//96040397, where // denotes concatenation.

Crossrefs

Cf. A115429, A116297, A116316, A116318, A116323.

Sequence in context: A052070 A052099 A079035 * A031586 A116335 A115440

Adjacent sequences: A116314 A116315 A116316 * A116318 A116319 A116320

Keyword

nonn,base

Author

Giovanni Resta, Feb 06 2006

Status

approved