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A153726 Initial digit of Catalan number A000108(n). 0

%I

%S 1,1,2,5,1,4,1,4,1,4,1,5,2,7,2,9,3,1,4,1,6,2,9,3,1,4,1,6,2,1,3,1,5,2,

%T 8,3,1,4,1,6,2,1,3,1,5,2,8,3,1,5,1,7,2,1,4,1,6,2,1,4,1,6,2,9,3,1,5,2,

%U 8,3,1,5,2,7,3,1,4,1,7,2,1,4,1,6,2,1

%N Initial digit of Catalan number A000108(n).

%F a(n)=A000030(A000108(n)).

%t First[IntegerDigits[#]]&/@CatalanNumber[Range[0,120]] (* _Harvey P. Dale_, Jan 20 2014 *)

%Y Cf. A000030, A008963, A077648, A152669.

%K base,nonn

%O 0,3

%A _Omar E. Pol_, Dec 30 2008

%E More terms from _Harvey P. Dale_, Jan 20 2014

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Last modified August 25 13:50 EDT 2019. Contains 326324 sequences. (Running on oeis4.)