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A117268 Triangle, binomial transform of the tribonacci sequence. 2
1, 1, 1, 2, 1, 2, 4, 2, 3, 5, 7, 4, 6, 9, 14, 13, 7, 11, 17, 26, 40, 24, 13, 20, 31, 48, 74, 114, 44, 24, 37, 57, 88, 136, 210, 324, 81, 44, 68, 105, 162, 250, 386, 596, 920 (list; table; graph; refs; listen; history; text; internal format)
OFFSET
1,4
COMMENTS
Leftmost column of the triangle = the tribonacci sequence A000073.
Rightmost diagonal of the triangle = A117189.
LINKS
FORMULA
Difference rows of A117267 become rows of A117268
EXAMPLE
Taking difference rows of A117267: (1; 1, 2; 2, 3, 5; 4, 6, 9, 14;...), we get A117268:
1;
1, 1;
2, 1, 2;
4, 2, 3, 5;
7, 4, 6, 9, 14;
13, 7, 11, 17, 26, 40;
24, 13, 20, 31, 48, 74, 114;
...
CROSSREFS
Cf. A117267, A117189 (row sums), A000073.
Sequence in context: A184990 A206299 A276053 * A361076 A279709 A261880
KEYWORD
nonn,tabl
AUTHOR
Gary W. Adamson, Mar 05 2006
STATUS
approved

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Last modified March 28 08:19 EDT 2024. Contains 371236 sequences. (Running on oeis4.)