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A332358
Main diagonal of A332357.
6
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
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
Sequence in context: A253427 A339805 A338972 * A011853 A215053 A213767
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Feb 11 2020
STATUS
approved