A332358 Main diagonal of A332357.

1, 5, 17, 47, 105, 215, 381, 649, 1029, 1563, 2257, 3209, 4385, 5925, 7793, 10053, 12745, 16061, 19881, 24487, 29749, 35799, 42649, 50649, 59545, 69701, 80993, 93655, 107597, 123375, 140489, 159705, 180697, 203685, 228625, 255893, 285153, 317401, 352097, 389577

Offset

1,2

Links

Table of n, a(n) for n=1..40.

Lars Blomberg, Scott R. Shannon, N. J. A. Sloane, Graphical Enumeration and Stained Glass Windows, 1: Rectangular Grids, (2021). Also arXiv:2009.07918.

Scott R. Shannon, Illustration for n = 4.

Scott R. Shannon, Illustration for n = 5.

Scott R. Shannon, Illustration for n = 10.

Scott R. Shannon, Illustration for n = 11.

Formula

a(n) = A306302(n-1) + 1. [see Max Alekseyev's comment in A306302] - Andrey Zabolotskiy, Sep 14 2023

Crossrefs

Cf. A332357, A306302.

Sequence in context: A253427 A339805 A338972 * A011853 A215053 A213767

Adjacent sequences: A332355 A332356 A332357 * A332359 A332360 A332361

Keyword

nonn

Author

N. J. A. Sloane, Feb 11 2020

Status

approved