A134354 Integer nearest to expression 2 Pi n^(2 n + 1) e^(-2 n).

1, 4, 34, 553, 13929, 504211, 24804343, 1592201163, 129266762933, 12950610156346, 1569397748147942, 226278584786787360, 38281932323382968320, 7510129222684065660928, 1691120063240224255246336

Offset

1,2

Comments

Integers in this sequence are <= (n!)^2 (see A001044)

Links

Table of n, a(n) for n=1..15.

Formula

a(n) = Round[2 Pi n^(2 n + 1)E^(-2 n)]

Mathematica

Table[Round[N[2 Pi n^(2 n + 1)E^(-2 n)]], {n, 1, 30}]

Crossrefs

Cf. A001044, A134354.

Sequence in context: A222077 A081972 A158961 * A333981 A030243 A222789

Adjacent sequences: A134351 A134352 A134353 * A134355 A134356 A134357

Keyword

nonn

Author

Artur Jasinski, Oct 22 2007

Status

approved