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A301685 Partial sums of A301684. 0
1, 5, 13, 25, 43, 65, 93, 127, 163, 205, 253, 303, 359, 421, 485, 555, 631, 709, 793, 883, 975, 1073, 1177, 1283, 1395, 1513, 1633, 1759, 1891, 2025, 2165, 2311, 2459, 2613, 2773, 2935, 3103, 3277, 3453, 3635, 3823, 4013, 4209, 4411, 4615, 4825, 5041, 5259, 5483, 5713, 5945, 6183, 6427, 6673, 6925, 7183, 7443, 7709, 7981 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..58.

FORMULA

Conjectures from Chai Wah Wu, Feb 03 2021: (Start)

a(n) = 2*a(n-1) - a(n-2) + a(n-3) - 2*a(n-4) + a(n-5) for n > 8.

G.f.: (2*x^8 - 2*x^6 - 3*x^4 - 3*x^3 - 4*x^2 - 3*x - 1)/((x - 1)^3*(x^2 + x + 1)). (End)

CROSSREFS

Cf. A301684.

Sequence in context: A241233 A064276 A240001 * A102724 A147031 A147220

Adjacent sequences:  A301682 A301683 A301684 * A301686 A301687 A301688

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Mar 25 2018

EXTENSIONS

More terms could now be added from A301684. - N. J. A. Sloane, Mar 29 2018

STATUS

approved

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Last modified September 21 00:14 EDT 2021. Contains 347596 sequences. (Running on oeis4.)