The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A152559 Largest term in row n of triangle A152555. 4
 1, 2, 7, 42, 495, 7436, 153361, 3853322, 116503839, 4127612326, 167061660005, 7671346786170, 392298901133895, 22113791358359574, 1365967717507556804, 91549507266620360316, 6624242349107514460269, 514871138228210665592112 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,2 COMMENTS Compare to row sums of triangle A152555: 2*(2n+2)^(n-1). Triangle A152555 lists coefficients in a q-analog of the function LambertW(-2x)/(-2x). LINKS PROG (PARI) {a(n)=local(e_q=1+sum(j=1, n, x^j/prod(i=1, j, (q^i-1)/(q-1))), LW2_q=serreverse(x/(e_q+x*O(x^n))^2)/x); vecsort(Vec(polcoeff(LW2_q+x*O(x^n), n, x)*prod(i=1, n, (q^i-1)/(q-1))))[n*(n-1)/2+1]} CROSSREFS Cf. A152555, A152556(q=-1), A152557 (q=2) A152558 (q=3). Sequence in context: A005130 A091669 A108042 * A267239 A001174 A067975 Adjacent sequences:  A152556 A152557 A152558 * A152560 A152561 A152562 KEYWORD nonn AUTHOR Paul D. Hanna, Dec 07 2008 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 September 22 17:16 EDT 2020. Contains 337291 sequences. (Running on oeis4.)