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URL: https://oeis.org/A069618

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A069618

a(1) = 6; a(2n) = smallest prime that is a right concatenation of a(2n-1) and a number with no insignificant zeros and a(2n+1) = smallest prime ending in ( the least significant digits) a(2n-1). Alternate left and right concatenation yielding primes.

3

6, 61, 461, 46133, 246133, 2461337, 22461337, 224613371, 12224613371, 1222461337117, 151222461337117, 15122246133711733, 615122246133711733, 615122246133711733213, 9615122246133711733213, 961512224613371173321349

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OFFSET

1,1

LINKS

Table of n, a(n) for n=1..16.

EXAMPLE

a(4) = 46133 starting with a(3) = 461 and a(5) = 246133 in a(4) = 46133.

CROSSREFS

Cf. A053582, A069605, A069606, A069607, A069608, A069609, A069610, A069611, A069613, A069614, A069615, A069616, A069617.

Sequence in context: A252873 A068171 A069633 * A155458 A152281 A053462

Adjacent sequences: A069615 A069616 A069617 * A069619 A069620 A069621

KEYWORD

nonn,base

AUTHOR

Amarnath Murthy, Mar 27 2002

EXTENSIONS

More terms from Antonio G. Astudillo (afg_astudillo(AT)lycos.com), Mar 30 2003

STATUS

approved