A154631 - OEIS

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A154631

Triangle read by rows: T(m,n) = 2mn + m + n + 5.

9, 12, 17, 15, 22, 29, 18, 27, 36, 45, 21, 32, 43, 54, 65, 24, 37, 50, 63, 76, 89, 27, 42, 57, 72, 87, 102, 117, 30, 47, 64, 81, 98, 115, 132, 149, 33, 52, 71, 90, 109, 128, 147, 166, 185, 36, 57, 78, 99, 120, 141, 162, 183, 204, 225, 39, 62, 85, 108, 131, 154

(list; table; graph; refs; listen; history; text; internal format)

OFFSET

1,1

COMMENTS

All terms are in A153044. - Vincenzo Librandi, Aug 30 2012

LINKS

Vincenzo Librandi, Table of n, a(n) for Rows n = 1..100, flattened

EXAMPLE

Triangle begins:

12, 17;

15, 22, 29;

18, 27, 36, 45;

21, 32, 43, 54, 65;

24, 37, 50, 63, 76, 89;

27, 42, 57, 72, 87, 102, 117;

30, 47, 64, 81, 98, 115, 132, 149;

33, 52, 71, 90, 109, 128, 147, 166, 185;

36, 57, 78, 99, 120, 141, 162, 183, 204, 225;

MATHEMATICA

Flatten[Table[2 n m + m + n + 5, {n, 10}, {m, n}]] (* Vincenzo Librandi, Aug 30 2012 *)

PROG

(Magma) /* Triangle: */ [[2*m*n+m+n+5: m in [1..n]]: n in [1..10]]; // Bruno Berselli, Aug 31 2012

CROSSREFS

Cf. A097069, A153044.

Sequence in context: A176062 A027571 A342757 * A199593 A356842 A174525

Adjacent sequences: A154628 A154629 A154630 * A154632 A154633 A154634

KEYWORD

nonn,tabl,easy

AUTHOR

Vincenzo Librandi, Jan 17 2009

EXTENSIONS

Minor edits by Jon E. Schoenfield, Jun 23 2010

STATUS

approved