A075632 a(1) = 1, then {sum of terms of the n-th group in A075631}/{sum of (n-1)-th group}.

1, 2, 6, 13, 30, 9, 1043, 33912, 59790655, 580913610959139, 214911536997049658831668865, 25870318432456657930010269271308674165876508194091

Offset

1,2

Links

Table of n, a(n) for n=1..12.

Formula

For n>1, a(n) = A075631(n) / A075631(n-1) [From Max Alekseyev, May 08 2009]

Crossrefs

Cf. A075631, A075633, A075634.

Sequence in context: A212586 A276411 A180965 * A288979 A289048 A297388

Adjacent sequences: A075629 A075630 A075631 * A075633 A075634 A075635

Keyword

nonn

Author

Amarnath Murthy, Sep 30 2002

Extensions

More terms from Jonathan Cross (jcross(AT)juggler.net), May 08 2004

One more term from Max Alekseyev, May 08 2009

Status

approved