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A095831 Triangle read by rows: T(n,k) = (n-k)^2, n>=1, 1<=k<=n. 1
0, 1, 0, 4, 1, 0, 9, 4, 1, 0, 16, 9, 4, 1, 0, 25, 16, 9, 4, 1, 0, 36, 25, 16, 9, 4, 1, 0, 49, 36, 25, 16, 9, 4, 1, 0, 64, 49, 36, 25, 16, 9, 4, 1, 0, 81, 64, 49, 36, 25, 16, 9, 4, 1, 0, 100, 81, 64, 49, 36, 25, 16, 9, 4, 1, 0, 121, 100, 81, 64, 49, 36, 25, 16, 9, 4, 1, 0, 144, 121, 100, 81 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,4

COMMENTS

Alternating row sums give A000217. - Omar E. Pol, Jan 26 2014

Row sums give A000330. - Omar E. Pol, Jan 27 2014

LINKS

Table of n, a(n) for n=1..82.

EXAMPLE

From Omar E. Pol, Jan 27 2011: (Start)

0;

1,    0;

4,    1,  0;

9,    4,  1,  0;

16,   9,  4,  1,  0;

25,  16,  9,  4,  1,  0;

36,  25, 16,  9,  4,  1,  0;

49,  36, 25, 16,  9,  4,  1,  0;

64,  49, 36, 25, 16,  9,  4,  1,  0;

81,  64, 49, 36, 25, 16,  9,  4,  1,  0;

100, 81, 64, 49, 36, 25, 16,  9,  4,  1,  0;

...

For n = 8 the row sum is 49 + 36 + 25 + 16 + 9 + 4 + 1 + 0 = A000330(8-1) = 140. The alternating row sum is 49 - 36 + 25 - 16 + 9 - 4 + 1 - 0 = A000217(8-1) = 28.

(End)

CROSSREFS

Cf. A055461.

Sequence in context: A152420 A050465 A134575 * A277531 A284982 A089962

Adjacent sequences:  A095828 A095829 A095830 * A095832 A095833 A095834

KEYWORD

easy,nonn,tabl

AUTHOR

Herman Jamke (hermanjamke(AT)fastmail.fm), Jul 10 2004

STATUS

approved

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Last modified October 18 14:58 EDT 2018. Contains 316323 sequences. (Running on oeis4.)