A133022 Product of n-th Fibonacci number and n-th Fibonacci number written backwards.

0, 1, 1, 4, 9, 25, 64, 403, 252, 1462, 3025, 8722, 63504, 77356, 291421, 9760, 778743, 12697747, 12537568, 7584334, 38398140, 710406346, 208476181, 2168819074, 4004525952, 3905576425, 47722137553, 160019976838, 37728297243, 474332543035, 33479625520

Offset

0,4

Links

G. C. Greubel, Table of n, a(n) for n = 0..1000

Formula

a(n) = A000045(n) * A004091(n).

Example

403 = 13*31.

Maple

a:= n-> (f-> (s-> f*parse(cat(s[-i]$i=1..length(s))))(
          ""||f))(((<<0|1>, <1|1>>^n)[1, 2])):
seq(a(n), n=0..30);  # Alois P. Heinz, Apr 06 2018

Mathematica

#*FromDigits[Reverse[IntegerDigits[#]]]&/@Fibonacci[Range[0, 40]] (* Harvey P. Dale, Oct 12 2012 *)

Crossrefs

Cf. A000045, A004091, A061205, A133019.

Sequence in context: A175627 A007598 A121648 * A184326 A217590 A279397

Adjacent sequences: A133019 A133020 A133021 * A133023 A133024 A133025

Keyword

base,easy,nonn

Author

Omar E. Pol, Nov 07 2007

Extensions

Corrected and extended by Harvey P. Dale, Oct 12 2012

Status

approved