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

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

Offset: 0

Author

Roger L. Bagula, Dec 13 2010

Keywords

• nonn
• tabf

Comments

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

Examples

			{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}
		

Crossrefs

Cf. A008292,A003099

Programs

Mathematica

<< DiscreteMath`Combinatorica`
a = Table[Table[Eulerian[n + 1, m^2], {m, 0, Floor[Sqrt[n]]}], {n, 0, 10}];
Flatten[%]

Extensions

Edited by N. J. A. Sloane, Jan 01 2011