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A086733
Convolution of sigma(n) with phi(n).
1
1, 4, 9, 19, 31, 54, 74, 117, 148, 217, 252, 366, 408, 562, 612, 833, 853, 1171, 1203, 1566, 1606, 2104, 2030, 2718, 2655, 3347, 3332, 4262, 3954, 5226, 4984, 6161, 5971, 7566, 6874, 8961, 8361, 10194, 9732, 12210, 10912, 14122, 13012, 15654, 14858, 18494
OFFSET
1,2
COMMENTS
Convolution of A340793 and the nonzero terms of A002088. - Omar E. Pol, Feb 17 2021
MATHEMATICA
Table[ListConvolve[DivisorSigma[1, Range[n]], EulerPhi[Range[n]]], {n, 50}]// Flatten (* Harvey P. Dale, Jul 18 2021 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
Jon Perry, Jul 29 2003
STATUS
approved