A283514 Concatenation of the numbers from n down to 3.

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

Table of n, a(n) for n=3..19.

Eric Weisstein's World of Mathematics, Consecutive Number Sequences

Crossrefs

Cf. A000422, A176024, A284891.

Sequence in context: A093163 A199020 A211959 * A299506 A350924 A141060

Adjacent sequences: A283511 A283512 A283513 * A283515 A283516 A283517

Keyword

base,nonn,easy

Author

XU Pingya, Apr 14 2017

Status

approved