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 A195805 T(n,k)=Number of triangular nXnXn 0..k arrays with all rows and diagonals having the same length having the same sum, with corners zero 10
 1, 1, 1, 1, 1, 2, 1, 1, 3, 8, 1, 1, 4, 27, 16, 1, 1, 5, 64, 105, 64, 1, 1, 6, 125, 496, 1695, 1184, 1, 1, 7, 216, 1759, 24928, 284427, 5300, 1, 1, 8, 343, 5052, 213319, 17528896, 11606931, 130324, 1, 1, 9, 512, 12469, 1274808 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,6 COMMENTS Table starts ....1........1........1......1.......1.....1...1.1.1.1 ....1........1........1......1.......1.....1...1.1.1 ....2........3........4......5.......6.....7...8.9 ....8.......27.......64....125.....216...343.512 ...16......105......496...1759....5052.12469 ...64.....1695....24928.213319.1274808 .1184...284427.17528896 .5300.11606931 LINKS Table of n, a(n) for n=1..51. EXAMPLE Some solutions for n=4 k=4 .....0........0........0........0........0........0........0........0 ....3.1......3.4......2.4......0.3......3.2......3.0......1.4......1.2 ...1.3.3....4.4.3....4.2.2....3.2.0....2.4.3....0.3.3....4.2.1....2.3.1 ..0.3.1.0..0.3.4.0..0.2.4.0..0.0.3.0..0.3.2.0..0.3.0.0..0.1.4.0..0.1.2.0 CROSSREFS Sequence in context: A243716 A356776 A333988 * A293908 A346249 A235453 Adjacent sequences: A195802 A195803 A195804 * A195806 A195807 A195808 KEYWORD nonn,tabl AUTHOR R. H. Hardin Sep 23 2011 STATUS approved

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Last modified March 1 06:29 EST 2024. Contains 370430 sequences. (Running on oeis4.)