1,1

Earls sequence for Catalan's constant.

Table of n, a(n) for n=1..9.

Eric Weisstein's World of Mathematics, Catalan's Constant Digits

Eric Weisstein's World of Mathematics, Earls Sequence

C = 0.915...4226..., so

a(1) = 2 (one 1 first appears at digit 2)

a(2) = 107 (two 2s first occur starting at digit 107)

Cf. A006752 (decimal expansion of Catalan's constant).

Sequence in context: A174409 A340054 A267550 * A156502 A111456 A157067

Adjacent sequences: A224816 A224817 A224818 * A224820 A224821 A224822

nonn,base,hard

Eric W. Weisstein, Jul 20 2013

a(9) from Eric W. Weisstein, Aug 07 2013

approved