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A114641 a(n) = 2^(a(n-2) + log_{2}(a(n-1))), a(1)=1, a(2)=2. 0
1, 2, 4, 16, 256, 16777216, 1942668892225729070919461906823518906642406839052139521251812409738904285205208498176 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

The subsequent terms are too large to include.

Apparently a(n) = A000643(n+2) - A000643(n+1). - R. J. Mathar, Apr 22 2007

LINKS

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

FORMULA

a(n) = a(n-1) * 2^a(n-2) for n >= 3. - Alois P. Heinz, Jun 28 2021

MATHEMATICA

RecurrenceTable[{a[1]==1, a[2]==2, a[n]==2^(a[n-2]+Log[2, a[n-1]])}, a, {n, 6}] (* Harvey P. Dale, Aug 23 2013 *)

CROSSREFS

Cf. A112237, A112866.

Sequence in context: A218148 A112535 A001146 * A152690 A194457 A001128

Adjacent sequences:  A114638 A114639 A114640 * A114642 A114643 A114644

KEYWORD

nonn

AUTHOR

Yasutoshi Kohmoto, Feb 18 2006

EXTENSIONS

Definition adapted to offset by Georg Fischer, Jun 18 2021

STATUS

approved

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Last modified January 21 03:58 EST 2022. Contains 350473 sequences. (Running on oeis4.)