A014727 Squares of even elements in Pascal's triangle A007318.

4, 16, 36, 16, 100, 100, 36, 400, 36, 64, 784, 3136, 4900, 3136, 784, 64, 1296, 7056, 15876, 15876, 7056, 1296, 100, 14400, 44100, 63504, 44100, 14400, 100, 108900, 213444, 213444, 108900, 144, 4356, 48400, 627264, 853776, 627264, 48400, 4356

Offset

0,1

Links

Harvey P. Dale, Table of n, a(n) for n = 0..1000

Formula

a(n) = A014428(n)^2. - Sean A. Irvine, Nov 18 2018

Mathematica

Select[Flatten[Table[Binomial[n, k], {n, 0, 20}, {k, 0, n}]], EvenQ]^2 (* Harvey P. Dale, Apr 18 2020 *)

Crossrefs

Cf. A007318, A014428.

Sequence in context: A078714 A292208 A104125 * A174597 A044065 A281795

Adjacent sequences: A014724 A014725 A014726 * A014728 A014729 A014730

Keyword

nonn,tabf,easy

Author

Mohammad K. Azarian

Extensions

More terms from Andrew J. Gacek (andrew(AT)dgi.net)

Status

approved