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 A325503 Heinz number of row n of the triangle of Stirling numbers of the second kind A008277. 2
 2, 4, 20, 884, 528844, 3460086044, 340672148731996, 477782556719729075524, 11694209380474301218263758996, 4967476846044415922850025924897606724, 43298471669920632729336800855543564573041217668, 7790810575556906457316064931238939360882160372451591124244 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS The Heinz number of a positive integer sequence (y_1,...,y_k) is prime(y_1)*...*prime(y_k). LINKS FORMULA a(n) = Product_{i = 1..n} prime(A008277(n,i)). A061395(a(n)) = A002870(n). A056239(a(n)) = A000110(n). EXAMPLE The sequence of terms together with their prime indices begins:                               2: {1}                               4: {1,1}                              20: {1,1,3}                             884: {1,1,6,7}                          528844: {1,1,10,15,25}                      3460086044: {1,1,15,31,65,90}                 340672148731996: {1,1,21,63,140,301,350}           477782556719729075524: {1,1,28,127,266,966,1050,1701}   11694209380474301218263758996: {1,1,36,255,462,2646,3025,6951,7770} MATHEMATICA Times@@@Table[Prime[StirlingS2[n, k]], {n, 1, 10}, {k, 1, n}] CROSSREFS Cf. A000040, A001222, A002870, A008277, A024412, A056239, A112798, A215366, A325500, A325502. Sequence in context: A059588 A132498 A325050 * A087314 A326972 A099179 Adjacent sequences:  A325500 A325501 A325502 * A325504 A325505 A325506 KEYWORD nonn AUTHOR Gus Wiseman, May 07 2019 STATUS approved

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Last modified October 22 19:53 EDT 2019. Contains 328319 sequences. (Running on oeis4.)