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A281025 Partial sums of A066570. 1
1, 3, 6, 14, 19, 163, 170, 554, 716, 19916, 19927, 1264087, 1264100, 5779940, 7237940, 17559860, 17559877, 75264356677, 75264356696, 353956196696, 355036399736, 1254282070136, 1254282070159, 16687983940438159, 16687983940813159, 17351136747929959, 17351143890496999 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..27.

FORMULA

a(n) = Sum_{i=1..n} A066570(i).

MAPLE

ListTools:-PartialSums([seq(A066570(n), n=1..27)]); # Peter Luschny, Nov 02 2017

MATHEMATICA

Table[Times @@ Select[Range[1, n], !CoprimeQ[#, n]&], {n, 1, 26}] // Accumulate (* Jean-Fran├žois Alcover, Nov 02 2017 *)

CROSSREFS

Cf. A066570(n) = the product of cototatives of n.

Sequence in context: A083356 A096337 A175318 * A109757 A075189 A291987

Adjacent sequences:  A281022 A281023 A281024 * A281026 A281027 A281028

KEYWORD

nonn

AUTHOR

Jaroslav Krizek, Jan 14 2017

EXTENSIONS

Edited by Peter Luschny, Nov 02 2017

STATUS

approved

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Last modified June 15 02:56 EDT 2021. Contains 345042 sequences. (Running on oeis4.)