OFFSET

1,1

COMMENTS

Computer solutions found by Oscar Volpatti.

LINKS

Chai Wah Wu, Table of n, a(n) for n = 1..10000

Carlos Rivera and Rodolfo Kurchan, Puzzle 1027. Integers as sum of distinct repdigits, The prime puzzles & problems connection.

EXAMPLE

8888 and 888 cannot be used in the same expression.

Examples: 25599 = 22222 + 3333 + 44, 98765 = 88888 + 7777 + 1111 + 555 + 333 + 99 + 2.

It appears that 987654 and 987650 cannot be expressed in this way.

25427 is the smallest number without solution.

Smallest solution that ends with digits from 0 to 9 (solutions from Oscar Volpatti): 0: 49390 1: 49501 2: 37032 3: 32093 4: 143204 5: 254315 6: 74106 7: 25427 8: 62958 9: 62959.

CROSSREFS

KEYWORD

base,nonn

AUTHOR

Rodolfo Kurchan, Jan 17 2021

STATUS

approved