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 A067055 a(n) = (n!)^(n*(n+1)/2). 1
 1, 1, 8, 46656, 63403380965376, 15407021574586368000000000000000, 1009212044656507725162109374628859215872000000000000000000000, 46564508204734663249790730337537405675293855389346558493242680777666577039360000000000000000000000000000 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,3 LINKS FORMULA (Product of first n natural numbers )^(sum of first n natural numbers ) EXAMPLE a(5) = (5!)^(1+...+5) = 120^15 = 15407021574586368000000000000000. a(6) = 720^21. MAPLE seq(mul(mul(j^k, j=1..n), k=1..n), n=0..7); # Zerinvary Lajos, Jun 02 2007 MATHEMATICA Table[n!^(n(n + 1)/2), {n, 1, 7}] PROG (PARI): for(n=1, 7, print1(n!^sum(k=1, n, k), ", ")) CROSSREFS Cf. A000142, A000217. Sequence in context: A256423 A175855 A063374 * A137142 A036535 A259167 Adjacent sequences:  A067052 A067053 A067054 * A067056 A067057 A067058 KEYWORD easy,nonn AUTHOR Amarnath Murthy, Jan 02 2002 EXTENSIONS More terms from Jason Earls and Robert G. Wilson v, Jan 04 2002 a(0)=1 prepended by Alois P. Heinz, Nov 13 2018 STATUS approved

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Last modified August 11 03:06 EDT 2020. Contains 336421 sequences. (Running on oeis4.)