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A324937 Triangle read by rows: T(n, k) = 2*n*k + n + k - 8. 0
-4, -1, 4, 2, 9, 16, 5, 14, 23, 32, 8, 19, 30, 41, 52, 11, 24, 37, 50, 63, 76, 14, 29, 44, 59, 74, 89, 104, 17, 34, 51, 68, 85, 102, 119, 136, 20, 39, 58, 77, 96, 115, 134, 153, 172, 23, 44, 65, 86, 107, 128, 149, 170, 191, 212, 26, 49, 72, 95, 118, 141, 164, 187, 210, 233, 256 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..66.

EXAMPLE

Triangle begins:

  -4;

  -1, 4;

   2, 9,  16;

   5, 14, 23, 32;

   8, 19, 30, 41, 52;

  11, 24, 37, 50, 63, 76;

  14, 29, 44, 59, 74, 89,  104;

  17, 34, 51, 68, 85, 102, 119, 136;

  20, 39, 58, 77, 96, 115, 134, 153, 172;  etc.

MATHEMATICA

t[n_, k_]:=2 n k + n + k - 8; Table[t[n, k], {n, 11}, {k, n}]//Flatten

PROG

(MAGMA) [2*n*k+n+k-8: k in [1..n], n in [1..11]]; /* As triangle */ [[2*n*k+n+k-8: k in [1..n]]: n in [1.. 15]];

CROSSREFS

Similar sequence T(n,k) = 2*n*k+n+k-h: A144562 (h=1); A154680 (h=2); A154684 (h=3); A155724 (h=4); A155546 (h=5); A155550 (h=6); A144670 (h=7); this sequence (h=8); A155551 (h=9).

Sequence in context: A155781 A161772 A093063 * A049007 A016686 A060037

Adjacent sequences:  A324934 A324935 A324936 * A324938 A324939 A324940

KEYWORD

tabl,sign,less

AUTHOR

Vincenzo Librandi, Mar 25 2019

STATUS

approved

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Last modified August 5 03:00 EDT 2021. Contains 346457 sequences. (Running on oeis4.)