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Numbers whose arithmetic derivative is of the form 4k+3, cf. A003415.
5

%I #5 Dec 01 2022 21:09:03

%S 10,26,27,30,34,45,58,63,70,74,75,78,82,90,99,102,105,106,110,117,122,

%T 125,146,147,153,165,171,174,175,178,182,190,194,195,202,207,210,218,

%U 222,226,230,231,234,238,245,246,250,255,261,270,273,274,275,279,285,286,298,306,310,314,318,325,330,333

%N Numbers whose arithmetic derivative is of the form 4k+3, cf. A003415.

%o (PARI) isA358774(n) = A358773(n);

%Y Cf. A003415, A358773 (characteristic function).

%Y Setwise difference A235991 \ A358772. Cf. also A327862, A327864.

%K nonn

%O 1,1

%A _Antti Karttunen_, Dec 01 2022