OEIS
The On-Line Encyclopedia of Integer Sequences® of Neil Sloane et al.
- A Handbook of Integer Sequences (Academic Press, New York and London 1973).
- Automatic detection and correction of invalid hyperlinks in the OEIS in 2008-2009
Work on individual sequences
- Triangles with interlacing rows, Clark Kimberling's problem no. 18
- A003828, Numbers n such that n^4 is a primitive sum of 3 positive fourth powers: 422481, 2813001, 8707481, 12197457, 16003017, 16430513, 20615673, 44310257, 68711097, 117112081, 145087793, 156646737, 589845921, 638523249, 873822121, 1259768473, 1679142729, 1787882337, 1871713857
- Negative-Positive incrementing sequences of Clark Kimberling, for example A131388, and A131393 with recovered Rule2
- A220952: 0, 1, 2, 3, 4, 9, 14, 19, 18, 17, 16, 11, 12, 13, ..., 49 ... by Don Knuth, Feb. 20, 2013 (nonn,unkn)
- Additional FASS curves: space-filling, self-avoiding, simple and self-similar curves
- A291939: 1, 12, 19, 27, 37 - overlapping of Collatz sequences, was
unkn, with visualization