A078663 a(n) = Sum_{i=1..n} Ulam(i), where Ulam(i) denotes the i-th Ulam number.

1, 3, 6, 10, 16, 24, 35, 48, 64, 82, 108, 136, 172, 210, 257, 305, 358, 415, 477, 546, 618, 695, 777, 864, 961, 1060, 1162, 1268, 1382, 1508, 1639, 1777, 1922, 2070, 2225, 2400, 2577, 2757, 2939, 3128, 3325, 3531, 3740, 3959, 4180, 4416, 4654, 4895, 5138, 5391

Offset

1,2

Links

Amiram Eldar, Table of n, a(n) for n = 1..10000

Crossrefs

Cf. A002858.

Sequence in context: A264847 A173653 A122046 * A173691 A280709 A025222

Adjacent sequences: A078660 A078661 A078662 * A078664 A078665 A078666

Keyword

easy,nonn

Author

Joseph L. Pe, Dec 15 2002

Status

approved