A014414 Odd elements in Pascal's triangle that are not 1.

3, 3, 5, 5, 15, 15, 7, 21, 35, 35, 21, 7, 9, 9, 45, 45, 11, 55, 165, 165, 55, 11, 495, 495, 13, 715, 1287, 1287, 715, 13, 91, 1001, 3003, 3003, 1001, 91, 15, 105, 455, 1365, 3003, 5005, 6435, 6435, 5005, 3003, 1365, 455, 105, 15, 17, 17, 153, 153, 19, 171

Offset

1,1

Links

Robert Israel, Table of n, a(n) for n = 1..10000

Example

Irregular array begins:
  3, 3
  5, 5
  15, 15
  7, 21, 35, 35, 21, 7
  9, 9
  45, 45
  ...

Maple

R:= NULL: count:= 0:
for n from 1 while count < 100 do
  V:= select(type, [seq(binomial(n, t), t=1..n-1)], odd);
  count:= count + nops(V);
  R:= R, op(V)
od:
R; # Robert Israel, May 25 2026

Crossrefs

Cf. A007318, A014421.

Sequence in context: A147198 A147048 A110192 * A087745 A087756 A243305

Adjacent sequences: A014411 A014412 A014413 * A014415 A014416 A014417

Keyword

nonn,easy,tabf,look

Author

Mohammad K. Azarian

Extensions

More terms from Erich Friedman

Offset corrected by Mohammad K. Azarian, Nov 19 2008

Status

approved