A172260 a(n) = A172240(n) + A172240(n+1).

10, 20, 30, 36, 48, 60, 68, 78, 84, 96, 114, 128, 138, 144, 152, 162, 172, 186, 198, 204, 212, 222, 240, 258, 268, 276, 288, 300, 308, 320, 336, 354, 372, 384, 390, 396

Offset

1,1

Comments

For a(n) > 10, a(n) is divisible by 6 except if A172240(n+1) - A172240(n) is equal to 6.

Links

Table of n, a(n) for n=1..36.

Crossrefs

Cf. A172240.

Sequence in context: A157938 A095208 A291625 * A300024 A069534 A237416

Adjacent sequences: A172257 A172258 A172259 * A172261 A172262 A172263

Keyword

nonn,easy

Author

Giovanni Teofilatto, Nov 20 2010

Status

approved