A046556 Odd numbers found when writing first denominator and then numerator of each element of the 1/3-Pascal triangle (by row).

1, 1, 1, 1, 1, 1, 1, 1, 3, 1, 1, 1, 1, 1, 3, 3, 1, 1, 1, 1, 3, 7, 3, 3, 7, 1, 1, 1, 1, 3, 1, 5, 1, 5, 3, 1, 1, 1, 1, 3, 13, 3, 25, 1, 3, 25, 3, 13, 1, 1, 1, 1, 3, 3, 3, 55, 3, 55, 3, 3, 1, 1, 1, 1, 3, 19, 1, 1, 31, 3, 1, 31, 1, 3, 19, 1, 1, 1, 1, 3, 3, 73

Offset

1,9

Links

Table of n, a(n) for n=1..82.

Example

  1/1;
  1/1  1/1;
  1/1  1/3  1/1;
  1/1  4/3  4/3  1/1;
  1/1  7/3  8/3  7/3  1/1;
  1/1 10/3  5/1  5/1 10/3  1/1;
  1/1 13/3 25/3 10/1 25/3 13/3  1/1;
  1/1 16/3 38/3 55/3 55/3 38/3 16/3 1/1; ...

Crossrefs

Cf. A046534.

Sequence in context: A328575 A106478 A115069 * A046535 A324198 A135939

Adjacent sequences: A046553 A046554 A046555 * A046557 A046558 A046559

Keyword

tabf,nonn,less

Author

Mohammad K. Azarian

Extensions

Data corrected by Sean A. Irvine, Apr 13 2021

Status

approved