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Numbers k such that 0 and 3 occur juxtaposed in the base-4 representation of k but not of k+1.

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`%I #11 Aug 25 2021 04:53:06
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`%S 12,19,28,35,44,51,60,67,79,83,92,99,108,115,124,131,143,147,156,163,
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`%T 172,179,188,207,211,220,227,236,243,252,259,271,275,284,291,300,319,
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`%U 323,335,339,348,355,364,371,380,387,399,403
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`%N Numbers k such that 0 and 3 occur juxtaposed in the base-4 representation of k but not of k+1.
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`%Y Cf. A007090.
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`%K nonn,base
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`%O 1,1
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`%A _Clark Kimberling_
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