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 A133081 An interpolation operator, companion to A133080. 3
 1, 1, 0, 0, 1, 1, 0, 0, 1, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS A133081 * [1,2,3,...] = A133090: (1, 1, 5, 3, 9, 5, 13, 7, 17, ...). A133080: diagonal and subdiagonal are switched. LINKS FORMULA Infinite lower triangular matrix, (1,0,1,0,...) in the main diagonal and (1,1,1,...) in the subdiagonal. EXAMPLE First few rows of the triangle: 1; 1, 0; 0, 1, 1; 0, 0, 1, 0; 0, 0, 0, 1, 1; ... PROG (PARI) row(n) = vector(n, k, if (k==n-1, 1, if (k==n, n%2))); lista(nn) = my(list=List()); for (n=1, nn, my(v=row(n)); for (k=1, #v, listput(list, v[k]))); Vec(list); \\ Michel Marcus, Mar 06 2022 CROSSREFS Cf. A133080, A133090, A040001 (row sums). Sequence in context: A191747 A330323 A280933 * A352573 A285345 A125999 Adjacent sequences: A133078 A133079 A133080 * A133082 A133083 A133084 KEYWORD nonn,easy,tabl AUTHOR Gary W. Adamson, Sep 09 2007 EXTENSIONS More terms from Michel Marcus, Mar 06 2022 STATUS approved

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Last modified March 23 10:10 EDT 2023. Contains 361443 sequences. (Running on oeis4.)