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A138866 Concatenation of first 3 digits and last 3 digits of n-th Mersenne prime A000668(n). 7
33, 77, 3131, 127127, 819191, 131071, 524287, 214647, 230951, 618111, 162127, 170727, 686151, 531127, 104087, 147007, 446351, 259071, 190991, 285607, 478111, 346551, 281191, 431471, 448751, 402511, 854671, 536207, 521007, 512311, 746447 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..31.

L. C. Noll, Mersenne Prime Digits and Names.

CROSSREFS

Cf. A000668, A080173, A104511, A138816, A138817, A138840, A138841.

Sequence in context: A246409 A211837 A138863 * A001987 A094846 A044171

Adjacent sequences:  A138863 A138864 A138865 * A138867 A138868 A138869

KEYWORD

base,nonn

AUTHOR

Omar E. Pol, Apr 02 2008

STATUS

approved

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Last modified December 4 21:30 EST 2020. Contains 338939 sequences. (Running on oeis4.)