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A072332 Largest eigenvalue, rounded to the nearest integer, of a rank n matrix of 1..n^2 filled successively along antidiagonals (A069480). 0
1, 5, 17, 38, 73, 126, 199, 296, 420, 576, 765, 992, 1261, 1574, 1935, 2348, 2815, 3341, 3928, 4581, 5302, 6096, 6964, 7912, 8942, 10058, 11262, 12560, 13954, 15447, 17042, 18745, 20557, 22482, 24524, 26686, 28971, 31383, 33926, 36602, 39416 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..41.

MATHEMATICA

f[n_] := Table[(i + j - 1)((i + j - 1) - 1)/2 + 1 + (j - 1) - Mod[i + j - 1, n, 1]^2 Quotient[i + j - 1, n, 1], {i, n}, {j, n}]; Table[ Sort[ Round[ Eigenvalues[ N[ f[n]]]]] [[ -1]], {n, 1, 45}]

CROSSREFS

Sequence in context: A146428 A146235 A087728 * A212968 A127744 A122734

Adjacent sequences:  A072329 A072330 A072331 * A072333 A072334 A072335

KEYWORD

nonn

AUTHOR

Robert G. Wilson v, Jul 15 2002

STATUS

approved

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Last modified January 19 00:40 EST 2020. Contains 331030 sequences. (Running on oeis4.)