A196732 Position of n-th appearance of n in decimal expansion of Pi.

2, 17, 16, 37, 49, 73, 97, 75, 56, 855, 710, 1081, 1077, 1637, 1658, 1652, 890, 1675, 1228, 2040, 1487, 2373, 2691, 2289, 2034, 2283, 1786, 2704, 4156, 3103, 3522, 3768, 4326, 3809, 3552, 4082, 3786, 3230, 4465, 4885, 4128, 4229, 5337, 3962, 4243, 3634, 4572, 3869, 4357, 5836

Offset

1,1

Comments

In decimal expansion of Pi (A000796)3,1,4,1,5,9,2,6,5,3,5,8,9,7,9,3,2,3,8,4,6,2,6,4,3,3,8,3,

2,7,9,5,0,2,8,8,4,

"1" is at 2nd position, hence a(1)=2,

"2" is at 7th and 17th positions, hence a(2)=17,

"3" is at 1st, 9th and 16th positions, hence a(3)=16.

Links

Zak Seidov, Table of n, a(n) for n = 1..1000

Mathematica

rd=RealDigits[N[Pi, 2*10^7]][[1]]; Table[idn=IntegerDigits[n]; Position[Partition[rd, Length[idn], 1], idn][[n, 1]], {n, 1000}]

Crossrefs

Cf. A000796.

Sequence in context: A226291 A359437 A077311 * A346391 A153652 A198290

Adjacent sequences: A196729 A196730 A196731 * A196733 A196734 A196735

Keyword

nonn,base

Author

Zak Seidov, Oct 05 2011

Status

approved