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 A158948 Triangle read by rows, left border = natural numbers repeated (1, 1, 2, 2, 3, 3, ...); all other columns = (1, 0, 1, 0, 1, 0, ...). 2
 1, 1, 1, 2, 0, 1, 2, 1, 0, 1, 3, 0, 1, 0, 1, 3, 1, 0, 1, 0, 1, 4, 0, 1, 0, 1, 0, 1, 4, 1, 0, 1, 0, 1, 0, 1, 5, 0, 1, 0, 1, 0, 1, 0, 1, 5, 1, 0, 1, 0, 1, 0, 1, 0, 1 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,4 COMMENTS Row sums = n. Eigensequence of the triangle = nonzero terms of A000071: (1, 2, 4, 7, 12, 20, ...) = ((F3 - 1), (F4 - 1), (F5 - 1), ...). LINKS FORMULA Triangle by rows, left border = natural numbers repeated (1, 1, 2, 2, 3, 3, ...); all other columns = (1, 0, 1, 0, 1, 0, ...). EXAMPLE First few rows of the triangle: 1; 1, 1; 2, 0, 1; 2, 1, 0, 1; 3, 0, 1, 0, 1; 3, 1, 0, 1, 0, 1; 4, 0, 1, 0, 1, 0, 1; 4, 1, 0, 1, 0, 1, 0, 1; 5, 0, 1, 0, 1, 0, 1, 0, 1; 5, 1, 0, 1, 0, 1, 0, 1, 0, 1; 6, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1; 6, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1; 7, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1; ... CROSSREFS Cf. A000071. Sequence in context: A293386 A322522 A168121 * A140224 A075993 A117170 Adjacent sequences: A158945 A158946 A158947 * A158949 A158950 A158951 KEYWORD nonn,tabf AUTHOR Gary W. Adamson, Mar 31 2009 STATUS approved

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Last modified December 3 11:24 EST 2022. Contains 358517 sequences. (Running on oeis4.)