A156563 a(n) = (-1)^n*Sum_{k=1..n} A078649(k)*(-1)^k.

2, 2, 6, 5, 8, 8, 10, 12, 14, 14, 17, 18, 20, 20, 24, 24, 27, 26, 30, 28, 34, 31, 36, 34, 40, 38, 42, 41, 44, 45, 47, 47, 50, 49, 54, 53, 57, 55, 60, 59, 62, 62, 64, 66, 67, 68, 70, 70, 74, 74, 76, 77, 80, 80, 82, 83, 84, 87, 88, 90, 90, 94, 94, 96, 97, 100, 101

Offset: 1

Author

Benoit Cloitre, Feb 10 2009

Keywords

• nonn

Links

• Jinyuan Wang, Table of n, a(n) for n = 1..1000

Crossrefs

Cf. A078649, A156562.