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A192695 Number of 1X8 integer matrices with each row summing to zero, row elements in nondecreasing order, rows in lexicographically nondecreasing order, and the sum of squares of the elements <= 2*n^2 (number of collections of 1 zero-sum 8-vectors with total modulus squared not more than 2*n^2, ignoring vector and component permutations) 1
2, 10, 42, 147, 415, 1040, 2336, 4841, 9324, 17035, 29556, 49428, 79553, 124531, 189360, 281680, 409383, 584737, 819889, 1133021, 1541844, 2072913, 2751299, 3615478, 4697427, 6051068, 7720384, 9776322, 12276825, 15316939, 18967552 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column (1,8,n) of A192710

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..90

EXAMPLE

Some solutions for 1X8 <= 2*4^2

.-4.-1..0..0..1..1..1..2...-3.-1.-1.-1..0..0..3..3...-3.-3.-1..0..1..2..2..2

CROSSREFS

Sequence in context: A317328 A083937 A085224 * A181052 A024483 A276666

Adjacent sequences:  A192692 A192693 A192694 * A192696 A192697 A192698

KEYWORD

nonn

AUTHOR

R. H. Hardin Jul 07 2011

STATUS

approved

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Last modified June 17 19:10 EDT 2019. Contains 324198 sequences. (Running on oeis4.)