1, 2, 6, 42, 1806 ,?? what is next

[anarkali perera]

this numbers has some proper way.then what is next?

[Nikes Shah]

first digit = 1+2
second digit = digit from above operation that comes after + sign
third digit = multiply 1st and second digit
fourth digit = repeat first digit
fifth digit = add 1 to first or fourth digit
sixth digit = repeat whatever you did in previous step
seventh digit = you can get this digit by dividing 3rd digit by 2nd digit

[Paul Clapham]

There's a website for everything on the Internet. Even one for integer sequences:

http://www.research.att.com/~njas/sequences/index.html?q=1%2C+2%2C+6%2C+42%2C+1806&language=english&go=Search

[Vikas Kapoor]

Paul, You are a party crasher.

[Ankit Garg]

I didn't see Paul's link, but its the multiplication of the number itself and its next number, so

1
1*2 = 2
2*3 = 6
6*7 = 42
42*43=1806
1806*1807= ............................................
ohh hell, Start->Run->calc->3263442

[Greg Charles]

That's one answer Paul's link came up with, although it expresses it as n^2 + n, rather than n * (n + 1). That's a pretty interesting site. I tried a bunch of sequences and it could nearly always derive the pattern.

[Tony Alicea]

2012. The last year of life on Earth. (Yeah, sure!)

[Devaka Cooray]

Tony Alicea wrote:2012. The last year of life on Earth. (Yeah, sure!)

Wait... Jesper will request you something

[Jesper de Jong]

Yes! If you think the world will end on 21 December 2012, then please send me all your money on 20 December 2012. You won't need that worthless paper anyway after the world has ended!