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A176798 Triangle read by rows: T(n,m)=1 + n*(2*m + 1 + n)/2, 0<=m<=n. 1
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 (list; table; graph; refs; listen; history; text; internal format)
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

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Last modified September 20 02:19 EDT 2021. Contains 347577 sequences. (Running on oeis4.)