A098355 Multiplication table of the powers of three read by antidiagonals.

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

Offset: 0

Author

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

Keywords

• nonn
• tabl

Comments

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

Examples

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

Links

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

Crossrefs

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

Programs

Mathematica

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