A031003 - OEIS

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A031003

Position of n-th 4 in A030998.

%I #6 May 06 2014 15:30:51

%S 4,16,30,44,49,51,53,55,57,58,59,61,72,86,105,126,147,168,176,179,182,

%T 185,188,189,191,194,210,231,252,273,294,315,323,326,329,332,335,336,

%U 338,341,357,378,399,420,441,462,470,473,476

%N Position of n-th 4 in A030998.

%t Flatten[Position[Flatten[IntegerDigits[#,7]&/@Range[0,200]],4]]-1 (* _Harvey P. Dale_, May 06 2014 *)

%K nonn

%O 1,1

%A _Clark Kimberling_