A100079 Starting from n = 0, a(n) = position of first occurrence of n in decimal places of Catalan's constant.

16, 2, 13, 24, 9, 3, 5, 11, 32, 1, 35, 34, 89, 52, 26, 2, 48, 10, 395, 14, 162, 13, 107, 30, 100, 76, 55, 182, 46, 90, 69, 140, 29, 129, 53, 24, 393, 43, 31, 247, 154, 9, 45, 139, 105, 715, 21, 78, 101, 27, 18, 25, 209, 159, 20, 6, 86, 103, 123, 3, 22, 93, 64, 68, 57, 5, 56

Offset

0,1

Links

Eric W. Weisstein, Table of n, a(n) for n = 0..999

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

Eric Weisstein's World of Mathematics, Constant Digit Scanning

Example

Catalan's constant begins: 0.915965594177219015054603514932, so first occurrence of 0 after the decimal point is at position 16; first occurrence of 1 is at position 2; first occurrence of 2 is at position 13; etc.

Mathematica

posC[n_] := Module[{c = RealDigits[Catalan, 10, 2000][[1]], idn = IntegerDigits[n]}, Position[Partition[c, Length[idn], 1], idn][[1, 1]]]; Table[posC[n], {n, 0, 90}] (* Harvey P. Dale, Mar 19 2011 *)

Crossrefs

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

Sequence in context: A180730 A040254 A285386 * A144532 A270570 A040255

Adjacent sequences: A100076 A100077 A100078 * A100080 A100081 A100082

Keyword

nonn,base,easy

Author

Mark Hudson (mrmarkhudson(AT)hotmail.com), Nov 03 2004

Status

approved