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

Author

N. J. A. Sloane, Feb 11 2020

Keywords

• nonn

Links

• 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.

Crossrefs

Cf. A332357, A306302.

Formula

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