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A090971
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Triangle read by rows: T(n,k) = {T(n-1,k)+T(n-1,k-1)} mod 2.
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0
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1, 0, 1, 1, 1, 1, 0, 0, 0, 1, 1, 0, 0, 1, 1, 0, 1, 0, 1, 0, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 0, 0, 1, 1, 0, 1, 0, 0, 0, 0, 0, 1, 0, 1, 1, 1, 1, 0, 0, 0, 0, 1, 1, 1, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 1, 0, 0, 1, 1, 0, 0, 1, 1, 0, 0, 1, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1
(list; table; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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COMMENTS
| Row sums give A038573.
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FORMULA
| Triangle A047999(n, k) for n>0 and k>0; A047999 : Pascal's triangle mod 2 . a(n) = A062534(n-1) mod 2 . T(n-1, k-1) = A074909(n, n-k) mod 2 . - DELEHAM Philippe (kolotoko(AT)wanadoo.fr), Feb 29 2004
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PROG
| (PARI) T(n, k)=if(k<0|k>n, 0, if(n==0, 1, (T(n-1, k)+T(n-1, k-1))%2))
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CROSSREFS
| Cf. A007318.
Sequence in context: A104521 A131379 A181656 * A105594 A091949 A039984
Adjacent sequences: A090968 A090969 A090970 * A090972 A090973 A090974
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KEYWORD
| nonn,tabl
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AUTHOR
| Benoit Cloitre (benoit7848c(AT)orange.fr), Feb 28 2004
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