A176798 Triangle read by rows: T(n,m)=1 + n*(2*m + 1 + n)/2, 0<=m<=n.

1, 2, 3, 4, 6, 8, 7, 10, 13, 16, 11, 15, 19, 23, 27, 16, 21, 26, 31, 36, 41, 22, 28, 34, 40, 46, 52, 58, 29, 36, 43, 50, 57, 64, 71, 78, 37, 45, 53, 61, 69, 77, 85, 93, 101, 46, 55, 64, 73, 82, 91, 100, 109, 118, 127, 56, 66, 76, 86, 96, 106, 116, 126, 136, 146, 156

Offset

0,2

Links

Ivan Neretin, Table of n, a(n) for n = 0..5150

Example

1;
2, 3;
4, 6, 8;
7, 10, 13, 16;
11, 15, 19, 23, 27;
16, 21, 26, 31, 36, 41;
22, 28, 34, 40, 46, 52, 58;
29, 36, 43, 50, 57, 64, 71, 78;
37, 45, 53, 61, 69, 77, 85, 93, 101;
46, 55, 64, 73, 82, 91, 100, 109, 118, 127;
56, 66, 76, 86, 96, 106, 116, 126, 136, 146, 156;

Maple

A176798 := proc(n, m)
    1+n*(2*m+1+n)/2 ;
end proc: # R. J. Mathar, Feb 18 2016

Mathematica

t[n_, m_] = 1 + n*(2*m + 1 + n)/2;
Table[Table[t[n, m], {m, 0, n}], {n, 0, 10}];
Flatten[%]

Crossrefs

Cf. A081435 (row sums), A104249 (diagonal).

Sequence in context: A285111 A253566 A333220 * A067118 A320503 A138561

Adjacent sequences: A176795 A176796 A176797 * A176799 A176800 A176801

Keyword

nonn,tabl,easy

Author

Roger L. Bagula, Apr 26 2010

Status

approved