A115837 Self-describing sequence. The n-th integer of the sequence indicates how many integers of the sequence are strictly < 3n.

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

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

Table of n, a(n) for n=1..67.

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

Adjacent sequences: A115834 A115835 A115836 * A115838 A115839 A115840

Keyword

base,easy,nonn

Author

Eric Angelini, Feb 01 2006

Status

approved