A156247 a(n)=sum(k=1,n,A000002(2*k))

2, 3, 5, 7, 8, 10, 11, 12, 14, 15, 16, 18, 20, 21, 23, 24, 25, 27, 29, 30, 32, 34, 35, 36, 38, 39, 41, 43, 44, 46, 48, 49, 51, 52, 53, 55, 57, 58, 59, 61, 62, 64, 65, 66, 68, 70, 71, 73, 74, 76, 78, 79, 80, 82, 84, 85, 87, 88, 89, 91, 92, 93, 95, 96, 97, 99, 100, 102, 104, 105

Offset

1,1

Links

Table of n, a(n) for n=1..70.

Crossrefs

Sequence in context: A034707 A288378 A187909 * A232532 A076798 A185596

Adjacent sequences: A156244 A156245 A156246 * A156248 A156249 A156250

Keyword

nonn

Author

Benoit Cloitre, Feb 07 2009

Status

approved