1000566

Appears in sequences

• Number of equilateral triangles formed by triples of points taken from a hexagonal chunk of side n in the hexagonal lattice.at n=27A008893
• Positive numbers k such that k and 6*k are anagrams in base 7 (written in base 7).at n=20A023072
• Numerators of continued fraction convergents to sqrt(44).at n=16A041074
• Number of times the digit 9 appears in the first 10^n decimal digits of sqrt(2), sometimes called Pythagoras's constant, counting after the decimal point.at n=6A322650