A086049 - OEIS

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A086049

Position of first occurrence of n-th prime in concatenated primes (A033308, Copeland-Erdos constant).

3

2, 3, 4, 5, 6, 8, 10, 12, 2, 16, 9, 20, 22, 24, 26, 28, 30, 32, 34, 5, 38, 40, 42, 44, 46, 48, 51, 54, 57, 7, 63, 8, 19, 72, 75, 78, 81, 84, 33, 37, 93, 96, 99, 102, 105, 108, 111, 114, 117, 120, 123, 126, 129, 132, 135, 138, 141, 64, 147, 150, 153, 16, 159, 67, 18

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

OFFSET

1,1

COMMENTS

A033308(a(n)) = A000030(A000040(n));

A033308(a(n)+i) = A033307(A086044(A000040(n))+i), 0 <= i < A055642(A000040(n)).

LINKS

Robert Israel, Table of n, a(n) for n = 1..10000

Eric Weisstein's World of Mathematics, Copeland-Erdos Constant

MAPLE

N:= 100: # for a(1)..a(N)

S:= cat(".", seq(ithprime(i), i=1..N)):

seq(StringTools:-Search(convert(ithprime(i), string), S), i=1..N); # Robert Israel, Jun 28 2019

CROSSREFS

Cf. A033307, A033308, A086044, A086048, A086050.

Sequence in context: A036409 A005423 A067319 * A328208 A173643 A377209

Adjacent sequences: A086046 A086047 A086048 * A086050 A086051 A086052

KEYWORD

nonn,base,look

AUTHOR

Reinhard Zumkeller, Jul 07 2003

STATUS

approved