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A281023 Partial sums of A067392. 1
0, 2, 5, 11, 16, 31, 38, 58, 76, 111, 122, 176, 189, 252, 312, 384, 401, 518, 537, 667, 772, 915, 938, 1142, 1217, 1412, 1547, 1785, 1814, 2159, 2190, 2462, 2693, 3016, 3226, 3676, 3713, 4112, 4424, 4924, 4965, 5616, 5659, 6209, 6704, 7279, 7326, 8118, 8314 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..49.

FORMULA

a(n) = Sum_{i=1..n} A067392(i).

PROG

(MAGMA) [0] cat [&+[&+[h: h in [2..k] | GCD(h, k) ne 1]: k in [2..n]]: n in [2..100]]

CROSSREFS

Cf. A067392(n) = sum of cototatives of n.

Cf. A281024.

Sequence in context: A287558 A024917 A081402 * A118660 A009770 A132121

Adjacent sequences:  A281020 A281021 A281022 * A281024 A281025 A281026

KEYWORD

nonn

AUTHOR

Jaroslav Krizek, Jan 14 2017

STATUS

approved

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Last modified August 12 23:19 EDT 2020. Contains 336440 sequences. (Running on oeis4.)