A146072 - OEIS

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A146072

First re-appearance of first digit in decimal expansion of sqrt(prime(n)).

3, 28, 2, 32, 2, 13, 18, 9, 18, 4, 2, 6, 17, 17, 5, 18, 8, 9, 3, 16, 20, 2, 10, 5, 12, 11, 3, 50, 13, 6, 2, 2, 2, 2, 10, 20, 12, 6, 25, 3, 9, 16, 11, 29, 13, 3, 38, 6, 7, 3, 60, 19, 6, 10, 5, 4, 5, 12, 7, 10, 11, 3, 5, 6, 5, 10, 3, 16, 10, 5, 48, 11, 3, 4, 14, 21, 13, 12, 4, 3, 16, 6, 11, 8, 5

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

LINKS

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

EXAMPLE

In the first 1000 terms, the largest is a(128): sqrt(prime(12)) = sqrt(719) = 26.8141753555838446187535034388744970639536100399145031439633780437859848191065407572.

MATHEMATICA

Table[rd=RealDigits[N[Sqrt@Prime[n], 100]][[1]]; Flatten[Position[rd, rd[[1]]]][[2]], {n, 1000}]

CROSSREFS

A065593 and A112788 First re-appearance of first n digits in decimal expansion of Pi and e.

Sequence in context: A071107 A162414 A188927 * A064234 A224579 A037102

Adjacent sequences: A146069 A146070 A146071 * A146073 A146074 A146075

KEYWORD

nonn,base

AUTHOR

Zak Seidov, Oct 26 2008

STATUS

approved