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A177822 Sub-triangle of A008292: terms with square indices. 0
1, 1, 1, 1, 4, 1, 11, 1, 26, 1, 1, 57, 57, 1, 120, 1191, 1, 247, 15619, 1, 502, 156190, 1, 1013, 1310354, 1, 1, 2036, 9738114, 2036 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,5
COMMENTS
Row sums are {1, 2, 5, 12, 28, 115, 1312, 15867, 156693, 1311369, 9742187,...}.
LINKS
EXAMPLE
{1},
{1, 1},
{1, 4},
{1, 11},
{1, 26, 1},
{1, 57, 57},
{1, 120, 1191},
{1, 247, 15619},
{1, 502, 156190},
{1, 1013, 1310354, 1},
{1, 2036, 9738114, 2036}
MATHEMATICA
<< DiscreteMath`Combinatorica`
a = Table[Table[Eulerian[n + 1, m^2], {m, 0, Floor[Sqrt[n]]}], {n, 0, 10}];
Flatten[%]
CROSSREFS
Sequence in context: A244608 A115022 A230534 * A091156 A092288 A111964
KEYWORD
nonn,tabf
AUTHOR
Roger L. Bagula, Dec 13 2010
EXTENSIONS
Edited by N. J. A. Sloane, Jan 01 2011
STATUS
approved

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Last modified July 13 14:24 EDT 2024. Contains 374284 sequences. (Running on oeis4.)