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A083995 a(1) = 9, then the smallest number such that the forward as well as the reverse n-th partial concatenation is a prime for n>1. (Reverse concatenation is taken term-wise and not digit-wise). 0
9, 7, 1, 27, 3, 63, 191, 297, 207, 19, 3107, 147, 159, 5679, 4579, 2739, 2223, 8517, 8649, 2531, 1699, 3969, 797, 12883, 11013, 4811, 15657, 2719, 2231, 15391, 32711, 35931, 6861, 3927, 87, 6057, 2083, 19943, 13389, 35679, 1653, 37519, 13347, 21567 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

LINKS

Table of n, a(n) for n=0..43.

CROSSREFS

Cf. A083992, A083993, A083994.

Sequence in context: A298752 A154396 A069611 * A195357 A328968 A267316

Adjacent sequences:  A083992 A083993 A083994 * A083996 A083997 A083998

KEYWORD

base,nonn

AUTHOR

Amarnath Murthy, May 23 2003

EXTENSIONS

More terms from Ray Chandler, Aug 03 2003

STATUS

approved

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Last modified September 24 03:21 EDT 2020. Contains 337315 sequences. (Running on oeis4.)