A116259 n times n+3 gives the concatenation of two numbers m and m-4.

7282817, 8171727, 4550754022124826466, 5449245977875173532, 8176518705147900805, 8951999555715882882349355522888, 9861090464806791973258446431979

Offset

1,1

Links

Table of n, a(n) for n=1..7.

Example

8171727 * 8171730 = 6677714//6677710, where // denotes
concatenation.

Crossrefs

Cf. A116128, A116253, A116260, A116274.

Sequence in context: A157378 A251356 A116236 * A158256 A306873 A269220

Adjacent sequences: A116256 A116257 A116258 * A116260 A116261 A116262

Keyword

nonn,base

Author

Giovanni Resta, Feb 06 2006

Status

approved