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A283514
Concatenation of the numbers from n down to 3.
0
3, 43, 543, 6543, 76543, 876543, 9876543, 109876543, 11109876543, 1211109876543, 131211109876543, 14131211109876543, 1514131211109876543, 161514131211109876543, 17161514131211109876543, 1817161514131211109876543, 191817161514131211109876543
OFFSET
3,1
COMMENTS
The a(3) = 3, a(4) = 43, a(7) = 76543, a(46) = 464544...876543 are primes in this sequence (for n < 2823).
LINKS
Eric Weisstein's World of Mathematics, Consecutive Number Sequences
CROSSREFS
KEYWORD
base,nonn,easy
AUTHOR
XU Pingya, Apr 14 2017
STATUS
approved