1,1
For a(n) > 10, a(n) is divisible by 6 except if A172240(n+1) - A172240(n) is equal to 6.
Table of n, a(n) for n=1..36.
Sequence in context: A157938 A095208 A291625 * A300024 A069534 A237416
Adjacent sequences: A172257 A172258 A172259 * A172261 A172262 A172263
nonn,easy
Giovanni Teofilatto, Nov 20 2010
approved