

A092241


Triangle read by rows: row n gives coefficients of (1+x+x^2)^n mod n.


1



0, 0, 0, 0, 1, 0, 1, 0, 1, 1, 0, 0, 1, 0, 0, 1, 1, 0, 2, 0, 3, 0, 2, 0, 1, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 1, 0, 3, 2, 0, 0, 3, 0, 0, 2, 3, 0, 1, 1, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 1, 1, 0, 4, 0, 2, 0, 0, 0, 3, 0, 0, 0, 2, 0, 4, 0, 1, 1, 0, 0, 3, 0, 0, 6, 0, 0, 7, 0, 0, 6, 0, 0, 3, 0, 0, 1
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OFFSET

0,19


LINKS

Table of n, a(n) for n=0..99.


EXAMPLE

Triangle begins:
[0]
[0, 0, 0]
[1, 0, 1, 0, 1]
[1, 0, 0, 1, 0, 0, 1]
[1, 0, 2, 0, 3, 0, 2, 0, 1]
[1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1]
[1, 0, 3, 2, 0, 0, 3, 0, 0, 2, 3, 0, 1]


MAPLE

f := n > seriestolist( series( expand( (1+x+x^2)^n ) mod n, x, 2*n+1));


CROSSREFS

Cf. A053200.
Sequence in context: A238801 A095704 A163496 * A336124 A256580 A213266
Adjacent sequences: A092238 A092239 A092240 * A092242 A092243 A092244


KEYWORD

nonn,tabf


AUTHOR

N. J. A. Sloane, Feb 20 2004


STATUS

approved



