Harmonic number identities via Euler's transform prefix ID Boyadzhiev, Khristo N. J. Integer Seq. 12(6), Article ID 09.6.1, 8 p., electronic only (2009)
Families of rational numbers with predictable Engel product expansions prefix ID Melham, R.S. J. Integer Seq. 12(6), Article ID 09.6.4, 7 p., electronic only (2009)
Compression theorems for periodic tilings and consequences prefix ID Benjamin, Arthur T.; Eustis, Alex K.; Shattuck, Mark A. J. Integer Seq. 12(6), Article ID 09.6.3, 15 p., electronic only (2009)
On recurrences of Fahr and Ringel arising in graph theory prefix ID Hirschhorn, Michael D. J. Integer Seq. 12(6), Article ID 09.6.8, 6 p., electronic only (2009)
On the Euler function of Fibonacci numbers prefix ID Luca, Florian; Mejía Huguet, V. Janitzio; Nicolae, Florin J. Integer Seq. 12(6), Article ID 09.6.6, 15 p., electronic only (2009)
On determining paint by numbers puzzles with nonunique solutions prefix ID Mullen, Ryan J. Integer Seq. 12(6), Article ID 09.6.5, 19 p., electronic only (2009)
A note on perfect totient numbers prefix ID Deng, Moujie J. Integer Seq. 12(6), Article ID 09.6.2, 8 p., electronic only (2009)
Unisequences and nearest integer continued fraction midpoint criteria for Pell's equation prefix ID Matthews, Keith R. J. Integer Seq. 12(6), Article ID 09.6.7, 24 p., electronic only (2009)
