A386687 Partial sums of A386369.

0, 1, 3, 5, 7, 9, 15, 21, 27, 33, 39, 45, 51, 57, 63, 69, 75, 81, 99, 117, 135, 153, 171, 189, 207, 225, 251, 277, 303, 329, 355, 381, 407, 433, 459, 485, 511, 537, 563, 589, 615, 641, 667, 693, 719, 745, 771, 797, 823, 849, 875, 901, 927, 953, 979, 1005, 1031, 1057, 1083, 1109

Offset

1,3

Links

Paolo Xausa, Table of n, a(n) for n = 1..10000

Formula

a(n) = Sum_{k=1..n} A386369(k).

Mathematica

Module[{s = 0, a = 0}, Table[If[IntegerQ[Sqrt[s += a]], a = n]; s, {n, 100}]]

Crossrefs

Cf. A386369, A386370, A386688.

Sequence in context: A211119 A211123 A290514 * A289873 A018736 A211134

Adjacent sequences: A386684 A386685 A386686 * A386688 A386689 A386690

Keyword

nonn,easy

Author

Paolo Xausa, Jul 29 2025

Status

approved