A180058 - OEIS

A180058

Smallest number occurring in exactly n rows of Pascal's triangle.

2, 6, 120, 3003

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

COMMENTS

A059233(a(n)) = n and A059233(m) < n for m < a(n).

LINKS

EXAMPLE

. n A180058 referred equal binomial coefficients (A007318) A059233

. - ------- ---------------------------------------------- -------

. 1 2 C (2, 1) 1

. 2 6 C (4, 2) C (6, 1) 2

. 3 120 C (10, 3) C (16, 2) C (120, 1) 3

. 4 3003 C (14, 6) C (15, 5) C (78, 2) C (3003, 1) 4 .

PROG

(Haskell)

import Data.List (elemIndex)

import Data.Maybe (fromJust)

a180058 = (+ 2) . fromJust . (`elemIndex` a059233_list)

CROSSREFS

KEYWORD

nonn,more

AUTHOR

STATUS

approved