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`%I #6 Apr 22 2022 12:02:17
`

`%S 7,24,42,60,78,96,114,117,119,121,123,125,127,129,131,132,133,150,176,
`

`%T 203,230,257,284,311,338,343,346,349,352,355,358,361,364,365,367,392,
`

`%U 419,446,473,500,527,554,581,586,589,592,595
`

`%N Position of n-th 7 in A031076.
`

`%t Position[Flatten[IntegerDigits[Range[300],9]],7]//Flatten (* _Harvey P. Dale_, Apr 22 2022 *)
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`%K nonn
`

`%O 1,1
`

`%A _Clark Kimberling_
`