1,1

Earls sequence for sqrt(2).

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

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

Eric Weisstein's World of Mathematics, Earls Sequence

sqrt(2) = 1.4142...0912297..., so

a(1) = 2 (one 1 first appears at digit 2 after the decimal) and

a(2) = 114 (two 2s first occur starting at digit 114).

Cf. A000129 (decimal expansion of sqrt(2)).

Sequence in context: A053976 A217088 A034312 * A230471 A140986 A157068

Adjacent sequences: A224868 A224869 A224870 * A224872 A224873 A224874

nonn,base,hard

Eric W. Weisstein, Jul 23 2013

approved