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A037288 Replace 2n+1 by concatenation of its nontrivial divisors. +0
1
0, 0, 0, 0, 3, 0, 0, 35, 0, 0, 37, 0, 5, 39, 0, 0, 311, 57, 0, 313, 0, 0, 35915, 0, 7, 317, 0, 511, 319, 0, 0, 37921, 513, 0, 323, 0, 0, 351525, 711, 0, 3927, 0, 517, 329, 0, 713, 331, 519, 0, 391133, 0, 0, 357152135, 0, 0, 337, 0, 523, 391339, 717, 11, 341, 525, 0, 343, 0 (list; graph; listen)
OFFSET

0,5

EXAMPLE

Divisors of 15 are 1,3,5,15, so a(7)=35

CROSSREFS

Sequence in context: A123474 A105786 A101192 this_sequence A009133 A009138 A111025

Adjacent sequences: A037285 A037286 A037287 this_sequence A037289 A037290 A037291

KEYWORD

nonn,base,easy

AUTHOR

njas

EXTENSIONS

More terms from Erich Friedman (erich.friedman(AT)stetson.edu).

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Last modified August 19 23:53 EDT 2008. Contains 142930 sequences.


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