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A098355 Multiplication table of the powers of three read by antidiagonals. 2
1, 3, 3, 9, 9, 9, 27, 27, 27, 27, 81, 81, 81, 81, 81, 243, 243, 243, 243, 243, 243, 729, 729, 729, 729, 729, 729, 729, 2187, 2187, 2187, 2187, 2187, 2187, 2187, 2187, 6561, 6561, 6561, 6561, 6561, 6561, 6561, 6561, 6561, 19683, 19683, 19683, 19683, 19683, 19683 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

0,2

COMMENTS

3^A003056: 3^n appears n+1 times.

LINKS

Jeremy Gardiner, Table of n, a(n) for n = 0..349

EXAMPLE

1; 3,3; 9,9,9; 27,27,27,27;

MATHEMATICA

Flatten[Table[3^x, {x, 0, 13}, {y, 0, x}]] (* Alonso del Arte, Nov 29 2011 *)

CROSSREFS

Cf. A000244, A003056, A003991, A098354, A137688.

Sequence in context: A201456 A336992 A064235 * A183429 A107443 A204099

Adjacent sequences:  A098352 A098353 A098354 * A098356 A098357 A098358

KEYWORD

nonn,tabl

AUTHOR

Douglas Stones (dssto1(AT)student.monash.edu.au), Sep 04 2004

STATUS

approved

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Last modified May 15 08:06 EDT 2021. Contains 343909 sequences. (Running on oeis4.)