A113764 Nondecreasing sequence of integers where each digit d is part of a group of d identical digits.

1, 2, 2, 3, 3, 3, 4, 4, 4, 4, 5, 5, 5, 5, 5, 6, 6, 6, 6, 6, 6, 7, 7, 7, 7, 7, 7, 7, 8, 8, 8, 8, 8, 8, 8, 8, 9, 9, 9, 9, 9, 9, 9, 9, 9, 12, 23, 33, 44, 44, 55, 55, 56, 66, 66, 67, 77, 77, 77, 88, 88, 88, 88, 99, 99, 99, 99, 912, 2333, 4444, 5555, 5666, 6667, 7777, 7788, 8888, 8899, 9999

Offset

1,2

Links

Table of n, a(n) for n=1..78.

Example

Take integer 23, for example; its digit 2 is part of a group of 2 identical digits (though belonging to two consecutive integers): ...12,23,33,44... The same can be said for the digit 3 in 23.

Crossrefs

Sequence in context: A087836 A087845 A130146 * A130148 A341510 A196238

Adjacent sequences: A113761 A113762 A113763 * A113765 A113766 A113767

Keyword

base,easy,nonn

Author

Eric Angelini, Jan 18 2006

Status

approved