Self-describing sequences and the Catalan family tree.
Sequences of definite integrals, factorials and double factorials.
Series and iterations for 1/π
Some alternating sums of Lucas numbers
We consider alternating sums of squares of odd and even terms of the Lucas sequence and alternating sums of their products. These alternating sums have nice representations as products of appropriate Fibonacci and Lucas numbers.
Some remarks on differentiable sequences and recursivity.
Staircases in .
Stapled sequences and stapling coverings of natural numbers.
Sums of squares and products of Jacobsthal numbers.