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Terms of sequence A005150 interpreted as numbers written in base 4 (written here in base ten).
2

%I #30 Jun 23 2024 02:24:10

%S 1,5,9,101,1385,3493,30121,358885,225859433,521661150629,

%T 1537769393977769,248286184577158309349,2349690596380762356487460713,

%U 7261901690904608168867803518651168165,76840829143792845266223009702402770017026931113

%N Terms of sequence A005150 interpreted as numbers written in base 4 (written here in base ten).

%C The terms in A005150 contain no digits other than 1, 2, and 3, so they can be read as numbers in base 4.

%H Edward Krogius, <a href="/A098097/b098097.txt">Table of n, a(n) for n = 1..25</a>

%F A005150(n) = A007090(a(n)). - _Michel Marcus_, Jun 22 2024

%e A005150(5) = 111221, and 111221_4 = 1385.

%Y Cf. A005150, A007090.

%K nonn,base

%O 1,2

%A _Axel Harvey_, Sep 14 2004

%E a(13)-a(15) added by _Andrew Howroyd_, Feb 12 2020