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A115844
Self-describing sequence. The n-th integer of the sequence indicates how many integers of the sequence are strictly < 10n.
0
1, 10, 11, 12, 13, 14, 15, 16, 17, 18, 20, 30, 40, 50, 60, 70, 80, 90, 100, 101, 110, 111, 112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143, 144, 145
OFFSET
1,2
COMMENTS
Terms computed by Gilles Sadowski. In building step by step the sequence one has sometimes the choice for an integer. If so take the smallest available one.
EXAMPLE
A(7)=15 because there are 15 integers in the sequence which are strictly < 70 (they are 1,10,11,12,13,14,15,16,17,18,20,30,40,50,60)
CROSSREFS
Sequence in context: A248014 A304366 A008715 * A008714 A058364 A228915
KEYWORD
base,easy,nonn
AUTHOR
Eric Angelini, Feb 01 2006
STATUS
approved