A378120 a(n) = (A000217(n) + A005132(n))/2.

0, 1, 3, 6, 6, 11, 17, 24, 24, 33, 33, 44, 44, 57, 57, 72, 72, 89, 107, 126, 126, 147, 147, 147, 171, 171, 197, 197, 225, 225, 255, 255, 287, 320, 354, 354, 390, 390, 390, 429, 429, 470, 470, 513, 513, 558, 558, 605, 605, 654, 654, 705, 705, 758, 758, 813, 813

Offset

0,3

Comments

a(n) is the sum of the up steps in the first n terms of Recaman's sequence A005132.

Links

Table of n, a(n) for n=0..56.

Index entries for sequences related to Recamán's sequence

Formula

a(n) = A005132(n) + A377748(n).

Crossrefs

Cf. A000217, A005132, A377748.

Sequence in context: A119980 A066779 A132384 * A201155 A200534 A138743

Adjacent sequences: A378117 A378118 A378119 * A378121 A378122 A378123

Keyword

nonn

Author

Paul Curtz, Nov 17 2024

Status

approved