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A090291 Index of first occurrence of n in A090290, or 0 if n does not occur in A090290. 1
1, 2, 5, 9, 35, 62, 195, 126, 186, 28, 230, 57, 26, 170, 280, 270, 265, 1008, 56, 398, 473, 376, 32, 581, 3204, 903, 898, 206, 1581, 2330, 2012, 370, 1512, 2119, 1548, 345, 646, 3481, 241, 1871, 2763, 995, 2304, 460, 633, 2338, 3801, 5138, 4472, 973, 4117, 2286 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

10^(n) -prime(a(n)) is a prime and least such prime. Conjecture: No term is zero.

LINKS

Table of n, a(n) for n=1..52.

EXAMPLE

a(3) = 9, 10^3-prime(i) is not a prime for i = 1 to 8. prime(9) = 23, 10^3 - 23= 977 is a prime.

CROSSREFS

Cf. A090289, A090290.

Sequence in context: A105456 A128565 A151952 * A161137 A229551 A247550

Adjacent sequences:  A090288 A090289 A090290 * A090292 A090293 A090294

KEYWORD

base,nonn

AUTHOR

Amarnath Murthy, Nov 29 2003

EXTENSIONS

More terms from David Wasserman, Oct 27 2005

STATUS

approved

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Last modified June 15 04:47 EDT 2021. Contains 345043 sequences. (Running on oeis4.)