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 A177822 Sub-triangle of A008292: terms with square indices. 0

%I #9 Mar 12 2014 16:37:17

%S 1,1,1,1,4,1,11,1,26,1,1,57,57,1,120,1191,1,247,15619,1,502,156190,1,

%T 1013,1310354,1,1,2036,9738114,2036

%N Sub-triangle of A008292: terms with square indices.

%C Row sums are {1, 2, 5, 12, 28, 115, 1312, 15867, 156693, 1311369, 9742187,...}.

%e {1},

%e {1, 1},

%e {1, 4},

%e {1, 11},

%e {1, 26, 1},

%e {1, 57, 57},

%e {1, 120, 1191},

%e {1, 247, 15619},

%e {1, 502, 156190},

%e {1, 1013, 1310354, 1},

%e {1, 2036, 9738114, 2036}

%t << DiscreteMath`Combinatorica`

%t a = Table[Table[Eulerian[n + 1, m^2], {m, 0, Floor[Sqrt[n]]}], {n, 0, 10}];

%t Flatten[%]

%Y Cf. A008292,A003099

%K nonn,tabf

%O 0,5

%A _Roger L. Bagula_, Dec 13 2010

%E Edited by _N. J. A. Sloane_, Jan 01 2011

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Last modified August 9 20:51 EDT 2024. Contains 375044 sequences. (Running on oeis4.)