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A334690 a(n) is the number of points in the interior of the n-th figure shown in A255011 (meaning the figure with 4n points on the perimeter). 7
1, 29, 245, 801, 2737, 4801, 12265, 19209, 33513, 49537, 87641, 101933, 178413, 220057, 286297, 379033, 551601, 606169, 880217, 951365, 1208965, 1507433, 1947785, 2002573, 2624309, 3055989, 3550317, 3954937, 5068921, 5062033, 6669541, 7081841, 8143061, 9364953, 10296329, 10918073, 13772225, 14842297, 16312317 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

a(n) = A331449(n) - 4*n. Computed from Lars Blomberg's b-file for A331449.

LINKS

N. J. A. Sloane, Table of n, a(n) for n = 1..52

CROSSREFS

Cf. A255011, A331448, A331449.

These are the sums of the rows in A334691.

Sequence in context: A142559 A125366 A126524 * A027939 A146127 A146038

Adjacent sequences:  A334687 A334688 A334689 * A334691 A334692 A334693

KEYWORD

nonn

AUTHOR

Scott R. Shannon and N. J. A. Sloane, May 17 2020

STATUS

approved

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Last modified October 30 05:44 EDT 2020. Contains 338077 sequences. (Running on oeis4.)