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A274990 a(n) = 2[n](n-2). 1
-1, 1, 0, 2, 4, 65536 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,4

COMMENTS

x[n]y is the square-bracket notation for hyperoperations.

See A054871 for details and key links.

LINKS

Table of n, a(n) for n=0..5.

EXAMPLE

a(0) = 2[0]-2 = -1;

a(1) = 2[1]-1 = 1;

a(2) = 2[2]0 = 0;

a(3) = 2[3]1 = 2;

a(4) = 2[4]2 = 4;

a(6) = 2[5]3 = 65536;

a(7) = 2[6]4 = 2[6]2[6]2 = 2[7]3.

CROSSREFS

Cf. A001695 (2[n]n).

Sequence in context: A070655 A006263 A266198 * A079236 A138852 A062701

Adjacent sequences:  A274987 A274988 A274989 * A274991 A274992 A274993

KEYWORD

sign

AUTHOR

Natan Arie' Consigli, Sep 24 2016

STATUS

approved

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Last modified April 22 14:50 EDT 2019. Contains 322356 sequences. (Running on oeis4.)