Independence Number
The number
for a Graph
. The independence number of the de Bruijn Graph oforder 
is given by 1, 2, 3, 7, 13, 28, ... (Sloane's A006946).
References
Sloane, N. J. A. SequenceA006946/M0834in ``An On-Line Version of the Encyclopedia of Integer Sequences.''http://www.research.att.com/~njas/sequences/eisonline.html and Sloane, N. J. A. and Plouffe, S.The Encyclopedia of Integer Sequences. San Diego: Academic Press, 1995.
- Sierpinski Number of the Second Kind
- Sierpinski's Composite Number Theorem
- Sierpinski Sieve
- Sierpinski Sponge
- Sierpinski's Prime Sequence Theorem
- Sierpinski's Theorem
- Sierpinski Tetrahedron
- Sierpinski Triangle
- Sieve
- Sieve of Eratosthenes
- Sievert Integral
- Sievert's Surface
- Sifting Property
- Sigma Algebra
- Sigma Function
- Sigmoid Curve
- Sigmoid Function
- Sign
- Signalizer Functor Theorem
- Signature (Knot)
- Signature (Quadratic Form)
- Signature (Recurrence Relation)
- Signature Sequence
- Signed Deviation
- Significance