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A115837 Self-describing sequence. The n-th integer of the sequence indicates how many integers of the sequence are strictly < 3n. 1
1, 3, 4, 6, 9, 10, 12, 13, 14, 15, 18, 19, 21, 24, 27, 30, 31, 32, 33, 36, 37, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 51, 54, 57, 58, 59, 60, 63, 64, 66, 69, 72, 75, 78, 81, 84, 87, 90, 93, 94, 95, 96, 97, 98, 99, 100, 101, 102, 105, 108, 111, 112, 113, 114, 117, 118, 120 (list; graph; refs; listen; history; text; internal format)
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.
Is this the same sequence as A080710? - Andrew S. Plewe, May 08 2007
LINKS
EXAMPLE
a(7)=12 because there are 12 integers in the sequence which are strictly < 21 (they are 1,3,4,6,9,10,12,13,14,15,18,19).
CROSSREFS
Sequence in context: A173671 A325440 A080710 * A102342 A286692 A014419
KEYWORD
base,easy,nonn
AUTHOR
Eric Angelini, Feb 01 2006
STATUS
approved

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Last modified March 19 01:57 EDT 2024. Contains 370952 sequences. (Running on oeis4.)