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 A334767 a(n) = Product_{k=1..n} d(2*k), where d() is the number of divisors function A000005. 0
 2, 6, 24, 96, 384, 2304, 9216, 46080, 276480, 1658880, 6635520, 53084160, 212336640, 1274019840, 10192158720, 61152952320, 244611809280, 2201506283520, 8806025134080, 70448201072640, 563585608581120, 3381513651486720, 13526054605946880 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS EXAMPLE a(4) = d(2)*d(4)*d(6)*d(8) = 2*3*4*4 = 96. MATHEMATICA Rest @ FoldList[Times, 1, DivisorSigma[0, Range[2, 40, 2]]] (* Amiram Eldar, May 10 2020 *) PROG (PARI) a(n) = prod(k=1, n, numdiv(2*k)); \\ Michel Marcus, May 10 2020 CROSSREFS Cf. A000005, A066843, A099777. Sequence in context: A179356 A179363 A084509 * A323260 A147915 A147906 Adjacent sequences:  A334764 A334765 A334766 * A334768 A334769 A334770 KEYWORD nonn AUTHOR Ctibor O. Zizka, May 10 2020 STATUS approved

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Last modified June 27 09:26 EDT 2022. Contains 354893 sequences. (Running on oeis4.)