A090988 a(n) = 2^A004736(n).

2, 4, 2, 8, 4, 2, 16, 8, 4, 2, 32, 16, 8, 4, 2, 64, 32, 16, 8, 4, 2, 128, 64, 32, 16, 8, 4, 2, 256, 128, 64, 32, 16, 8, 4, 2, 512, 256, 128, 64, 32, 16, 8, 4, 2, 1024, 512, 256, 128, 64, 32, 16, 8, 4, 2, 2048, 1024, 512, 256, 128, 64, 32, 16, 8, 4, 2, 4096, 2048, 1024, 512, 256

Offset: 1

Author

Alford Arnold, Feb 29 2004

Keywords

• easy
• nonn
• tabl

Examples

			Triangle begins
   2
   4 2
   8 4 2
  16 8 4 2
		

Crossrefs

Cf. A004736.

Programs

Mathematica

Flatten[Table[2^n,{i,15},{n,i,1,-1}]] (* Harvey P. Dale, Dec 27 2011 *)

Formula

a(n) = 2^A004736(n).