A086049 Position of first occurrence of n-th prime in concatenated primes (A033308, Copeland-Erdos constant).

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

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 A120722

Adjacent sequences: A086046 A086047 A086048 * A086050 A086051 A086052

Keyword

nonn,base,look

Author

Reinhard Zumkeller, Jul 07 2003

Status

approved