A051543 Quotients of consecutive values of lcm of first n triangular numbers (A000217).

3, 2, 5, 1, 7, 2, 3, 1, 11, 1, 13, 1, 1, 2, 17, 1, 19, 1, 1, 1, 23, 1, 5, 1, 3, 1, 29, 1, 31, 2, 1, 1, 1, 1, 37, 1, 1, 1, 41, 1, 43, 1, 1, 1, 47, 1, 7, 1, 1, 1, 53, 1, 1, 1, 1, 1, 59, 1, 61, 1, 1, 2, 1, 1, 67, 1, 1, 1, 71, 1, 73, 1, 1, 1, 1, 1, 79, 1, 3, 1, 83, 1, 1, 1, 1, 1, 89, 1, 1, 1, 1, 1, 1, 1

Offset

1,1

Links

Reinhard Zumkeller, Table of n, a(n) for n = 1..10000

Formula

a(n) = A025555(n+1)/A025555(n)

Example

a(5) = A025555(6)/A025555(5) = 210/30 = 7

Prog

(Haskell)
a051543 n = a051542_list !! (n-1)
a051543_list = zipWith div (tail a025555_list) a025555_list
-- Reinhard Zumkeller, Mar 12 2014

Crossrefs

Cf. A025555.

Cf. A051542.

Sequence in context: A099643 A224344 A113260 * A265574 A129538 A076934

Adjacent sequences: A051540 A051541 A051542 * A051544 A051545 A051546

Keyword

easy,nonn

Author

Asher Auel

Extensions

Corrected and extended by James A. Sellers

Status

approved