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A143844 Triangle T(n,k) = k^2 read by rows. 0
0, 0, 1, 0, 1, 4, 0, 1, 4, 9, 0, 1, 4, 9, 16, 0, 1, 4, 9, 16, 25, 0, 1, 4, 9, 16, 25, 36, 0, 1, 4, 9, 16, 25, 36, 49, 0, 1, 4, 9, 16, 25, 36, 49, 64, 0, 1, 4, 9, 16, 25, 36, 49, 64, 81, 0, 1, 4, 9, 16, 25, 36, 49, 64, 81, 100, 0, 1, 4, 9, 16, 25, 36, 49, 64, 81, 100, 121 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

0,6

COMMENTS

This is triangle A133819 with an additional leading column of zeros.

Comment from Paul Curtz, Jun 10 2011: (Start)

There is a family of even integer-valued polynomials p_n(x) = product_{k=0..n} (x^2 - T(n,k))/ A002674(n+1). We find p_0(x) in A000290, p_1(x) in A002415, p_2(x) essentially in A040977, p_3(x) in A053347 and p_4(x) in A054334. (End)

LINKS

Table of n, a(n) for n=0..77.

FORMULA

T(n,k) = (A002262(n,k))^2.

MATHEMATICA

Table[Range[0, n]^2, {n, 0, 15}]//Flatten (* Harvey P. Dale, Sep 08 2017 *)

PROG

(PARI) for(n=0, 9, for(k=0, n, print1(k^2", "))) \\ Charles R Greathouse IV, Jun 10 2011

CROSSREFS

Sequence in context: A232195 A217476 A100045 * A186759 A065623 A178103

Adjacent sequences:  A143841 A143842 A143843 * A143845 A143846 A143847

KEYWORD

nonn,tabl,easy,changed

AUTHOR

Paul Curtz, Sep 03 2008

EXTENSIONS

Definition simplified by R. J. Mathar, Sep 07 2009

STATUS

approved

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Last modified September 22 00:25 EDT 2017. Contains 292326 sequences.