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

1,1

Links

Table of n, a(n) for n=1..71.

Formula

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

Example

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

Mathematica

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

Crossrefs

Cf. A004736.

Sequence in context: A030057 A286596 A134066 * A267584 A337194 A343997

Adjacent sequences: A090985 A090986 A090987 * A090989 A090990 A090991

Keyword

easy,nonn,tabl

Author

Alford Arnold, Feb 29 2004

Status

approved