A116343 Numbers k such that k*(k+1) gives the concatenation of two numbers m and m+8.

14, 86, 76983, 714690, 952314, 90438191, 96320544, 32980078899029, 34346653774238, 42816188292273, 42881990066488, 57118009933512, 57183811707727, 65653346225762, 67019921100971, 81321742742210

Offset

1,1

Links

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

Example

96320544 * 96320545 = 92776472//92776480, where // denotes concatenation.

Crossrefs

Cf. A116172, A116329, A116344, A116348.

Sequence in context: A206614 A345107 A321941 * A259473 A202785 A255535

Adjacent sequences: A116340 A116341 A116342 * A116344 A116345 A116346

Keyword

nonn,base

Author

Giovanni Resta, Feb 06 2006

Status

approved