The OEIS is supported by the many generous donors to the OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A032320 Doubles (index 2+) under "EGJ" (unordered, element, labeled) transform. 1
 2, 2, 12, 126, 1800, 33540, 757680, 20149290, 616940520, 21378058800, 827126546400, 35346832387020, 1653593623521840, 84055016334088800, 4613207941230688800, 271883701342581277950, 17125855412989960236600, 1148187688612239672677280, 81635218693106948988998880 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS Andrew Howroyd, Table of n, a(n) for n = 1..200 C. G. Bower, Transforms (2) PROG (PARI) EGJ(v)={Vec(serlaplace(prod(k=1, #v, (1 + x^k/k! + O(x*x^#v))^v[k]))-1, -#v)} seq(n)={my(v=[2]); for(i=2, n, v=concat(v, EGJ(concat(v, [0]))[i])); v} \\ Andrew Howroyd, Sep 21 2018 (PARI) seq(n)={my(p=(1+x)^2 + O(x*x^n)); for(k=2, n, p*=(1 + x^k/k! + O(x*x^n))^(k!*polcoef(p, k))); Vec(x+serlaplace(p-1)/2)} \\ Andrew Howroyd, Sep 21 2018 CROSSREFS Sequence in context: A013311 A303343 A087220 * A032227 A032069 A003090 Adjacent sequences:  A032317 A032318 A032319 * A032321 A032322 A032323 KEYWORD nonn AUTHOR EXTENSIONS Terms a(17) and beyond from Andrew Howroyd, Sep 21 2018 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.

Last modified January 28 04:11 EST 2022. Contains 350654 sequences. (Running on oeis4.)