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A034692 a(n+1) = smallest number that is not the sum of a(n) or fewer terms of a(1),...,a(n). 0
1, 2, 5, 23, 455, 197447, 38895873863, 1512881323770591465287, 2288809899755012359449577849239960517955399, 5238650757216549725917660910593720468102050623548424798300898740084824366637074960199 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..10.

FORMULA

a(n+1)=a(n)^2+2*a(n)-a(n)*a(n-1)-a(n-1), n>1.

MATHEMATICA

RecurrenceTable[{a[1]==1, a[2]==2, a[n]==a[n-1]^2+2a[n-1]- a[n-1] a[n-2]- a[n-2]}, a, {n, 10}] (* Harvey P. Dale, Dec 24 2014 *)

CROSSREFS

Sequence in context: A158889 A181074 A078125 * A002507 A137094 A209866

Adjacent sequences:  A034689 A034690 A034691 * A034693 A034694 A034695

KEYWORD

nonn

AUTHOR

Erich Friedman

EXTENSIONS

Formula and more terms from Christian G. Bower.

STATUS

approved

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Last modified February 16 21:04 EST 2019. Contains 320191 sequences. (Running on oeis4.)