A143966 Eigentriangle with row sums = A001333 starting (1, 3, 7, 17, 41, 99, ...).

1, 2, 1, 2, 2, 3, 2, 2, 6, 7, 2, 2, 6, 14, 17, 2, 2, 6, 14, 34, 41, 2, 2, 6, 14, 34, 82, 99, 2, 2, 6, 14, 34, 82, 198, 239, 2, 2, 6, 14, 34, 82, 198, 478, 577

Offset

0,2

Comments

Right border = A001333.

Row sums = shifted A001333: (1, 3, 7, 17, 41, 99, ...) = INVERT transform of (1, 2, 2, 2, ...). Sum of n-th row terms = rightmost term of next row.

Links

Table of n, a(n) for n=0..44.

Formula

n-th row of the triangle = n terms of twice A001333: (1, 1, 3, 7, 17, 41, 99, ...) followed by A001333(n).

Example

First few rows of the triangle:
  1;
  2, 1;
  2, 2, 3;
  2, 2, 6,  7;
  2, 2, 6, 14, 17;
  2, 2, 6, 14, 34, 41;
  2, 2, 6, 14, 34, 82, 99;
  2, 2, 6, 14, 34, 82, 198, 239;
  ...

Crossrefs

Cf. A001333.

Sequence in context: A365576 A290983 A272887 * A260617 A178695 A185315

Adjacent sequences: A143963 A143964 A143965 * A143967 A143968 A143969

Keyword

nonn,tabl

Author

Gary W. Adamson, Sep 06 2008

Status

approved