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 A327783 Heinz numbers of integer partitions whose LCM is a multiple of their sum. 6
 2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 30, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97, 101, 103, 107, 109, 113, 127, 131, 137, 139, 149, 151, 154, 157, 163, 165, 167, 173, 179, 181, 190, 191, 193, 197, 198, 199, 211, 223, 227, 229, 233, 239, 241 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS First differs from A319333 in having 154. First nonsquarefree term is 198. The Heinz number of an integer partition (y_1,...,y_k) is prime(y_1)*...*prime(y_k). LINKS FORMULA A056239(a(k)) | A290103(a(k)). EXAMPLE The sequence of terms together with their prime indices begins:     2: {1}     3: {2}     5: {3}     7: {4}    11: {5}    13: {6}    17: {7}    19: {8}    23: {9}    29: {10}    30: {1,2,3}    31: {11}    37: {12}    41: {13}    43: {14}    47: {15}    53: {16}    59: {17}    61: {18}    67: {19} MATHEMATICA primeMS[n_]:=If[n==1, {}, Flatten[Cases[FactorInteger[n], {p_, k_}:>Table[PrimePi[p], {k}]]]]; Select[Range[2, 100], Divisible[LCM@@primeMS[#], Total[primeMS[#]]]&] CROSSREFS The enumeration of these partitions by sum is A327778. Heinz numbers of partitions whose LCM is twice their sum are A327775. Heinz numbers of partitions whose LCM is less than their sum are A327776. Heinz numbers of partitions whose LCM is greater than their sum are A327784. Cf. A056239, A074761, A112798, A290103, A316413, A326841, A327779. Sequence in context: A028905 A030059 A201879 * A319333 A326715 A338925 Adjacent sequences:  A327780 A327781 A327782 * A327784 A327785 A327786 KEYWORD nonn AUTHOR Gus Wiseman, Sep 25 2019 STATUS approved

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Last modified July 23 22:20 EDT 2021. Contains 346265 sequences. (Running on oeis4.)