A156071 Concatenation chain arising in A156069.

3, 38, 381, 3816, 38165, 381654, 3816547, 38165472, 381654729

Offset: 1

Author

Alexander R. Povolotsky, Sep 25 2009

Keywords

• nonn
• base
• fini
• full

Comments

a(9) is a zeroless pandigital number in base 10, with 9 digits such that every k-digit substring ( 1 <= k <= 9 ) taken from the left, is divisible by k (see A163574). - Michel Marcus, Dec 01 2013

References

• Matt Parker, Things to make and do in the fourth dimension, 2015, pages 7-9.

Links

• Blaine, How about a math puzzle?
• Albert Franck, Puzzles, see item 7.
• Wikipedia, Polydivisible number
• Jim Wilson, Statement of Nine-Digit Number puzzle

Crossrefs

Cf. A010784, A030299, A050289, A143671, A144688, A156069, A158242, A163574.