login
This site is supported by donations to The OEIS Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A160710 E.g.f.: Sum_{n>=0} 2^(n^2)*log(1+x)^n/n!. 1
1, 2, 14, 468, 62628, 32916240, 68221619760, 561512669071200, 18431003537355665760, 2417187863502316739842560, 1267541812947815891035704645120, 2658386273978048637324643356687805440 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

G. C. Greubel, Table of n, a(n) for n = 0..57

FORMULA

a(n) = Sum_{k=0..n} Stirling1(n, k)*2^(k^2) where Stirling1 numbers are described by A008275.

EXAMPLE

E.g.f.: A(x) = 1 + 2*x + 14*x^2/2! + 468*x^3/3! + 62628*x^4/4! +...

A(x) = 1 + 2*log(1+x) + 2^4*log(1+x)^2/2! + 2^9*log(1+x)^3/3! +...

MATHEMATICA

Table[Sum[StirlingS1[n, k]*2^(k^2), {k, 0, n}], {n, 0, 30}] (* G. C. Greubel, May 02 2018 *)

PROG

(PARI) {a(n)=n!*polcoeff(sum(k=0, n, 2^(k^2)*log(1+x+x*O(x^n))^k/k!), n)}

(PARI) {a(n)=sum(k=0, n, 2^(k^2)*n!*polcoeff(binomial(x, n), k))}

CROSSREFS

Cf. A006025, A006024.

Sequence in context: A135865 A306815 A324306 * A271145 A277134 A009997

Adjacent sequences:  A160707 A160708 A160709 * A160711 A160712 A160713

KEYWORD

nonn

AUTHOR

Paul D. Hanna, May 25 2009

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified March 26 05:43 EDT 2019. Contains 321481 sequences. (Running on oeis4.)