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A034931
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Pascal's triangle read modulo 4.
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13
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1, 1, 1, 1, 2, 1, 1, 3, 3, 1, 1, 0, 2, 0, 1, 1, 1, 2, 2, 1, 1, 1, 2, 3, 0, 3, 2, 1, 1, 3, 1, 3, 3, 1, 3, 1, 1, 0, 0, 0, 2, 0, 0, 0, 1, 1, 1, 0, 0, 2, 2, 0, 0, 1, 1, 1, 2, 1, 0, 2, 0, 2, 0, 1, 2, 1, 1, 3, 3, 1, 2, 2, 2, 2, 1, 3, 3, 1, 1, 0, 2, 0, 3, 0, 0, 0, 3, 0, 2, 0, 1, 1, 1, 2, 2, 3, 3, 0, 0, 3, 3, 2, 2, 1, 1
(list; table; graph; refs; listen; history; internal format)
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OFFSET
| 0,5
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REFERENCES
| Huard et al., Europ. J. Combin., 19 (1998), 45-62.
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EXAMPLE
| Triangle begins:
{1},
{1, 1},
{1, 2, 1},
{1, 3, 3, 1},
{1, 0, 2, 0, 1},
{1, 1, 2, 2, 1, 1},
{1, 2, 3, 0, 3, 2, 1},
{1, 3, 1, 3, 3, 1, 3, 1},
{1, 0, 0, 0, 2, 0, 0, 0, 1},
{1, 1, 0, 0, 2, 2, 0, 0, 1, 1},
{1, 2, 1, 0, 2, 0, 2, 0, 1, 2, 1},
{1, 3, 3, 1, 2, 2, 2, 2, 1, 3, 3, 1},
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MATHEMATICA
| Mod[ Flatten[ Table[ Binomial[n, k], {n, 0, 13}, {k, 0, n}]], 4] (from Robert G. Wilson v May 26 2004)
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CROSSREFS
| Cf. A007318, A047999, A083093, A034930, A008975, A034932.
Sequence in context: A186332 A129571 A180180 * A090402 A026082 A117185
Adjacent sequences: A034928 A034929 A034930 * A034932 A034933 A034934
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KEYWORD
| nonn,tabl
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com).
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