This site is supported by donations to The OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A283720 Main diagonal of A283675. 2
 1, -1, -16, -19619, -4294403215, -298022109672568357, -10314423865939993706950978963, -256923577039780637227768848162543179896514, -6277101735175091675863380669683250419973895230549186236030 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,3 LINKS Seiichi Manyama, Table of n, a(n) for n = 0..26 MATHEMATICA Table[SeriesCoefficient[Product[(1 - x^k)^(k^(n*k)), {k, 1, 10}], {x, 0, n}], {n, 0, 10}] (* Indranil Ghosh, Mar 17 2017 *) PROG (Ruby) def s(k, i)   s = 0   (1..i).each{|j| s += j ** (k * j + 1) if i % j == 0}   s end def A(k, n)   ary = [1]   s_ary = [0] + (1..n).map{|i| s(k, i)}   (1..n).each{|i| ary << (1..i).inject(0){|s, j| s - ary[-j] * s_ary[j]} / i}   ary end def A283720(n)   (0..n).map{|i| A(i, i)[-1]} end CROSSREFS Cf. A283675. Sequence in context: A214637 A288957 A159387 * A098175 A089232 A300615 Adjacent sequences:  A283717 A283718 A283719 * A283721 A283722 A283723 KEYWORD sign AUTHOR Seiichi Manyama, Mar 15 2017 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 October 21 08:47 EDT 2019. Contains 328292 sequences. (Running on oeis4.)