OFFSET
1,1
COMMENTS
The numerator numbers to be concatenated are taken from 2,3,4,... and the denominator numbers from 1,2,3,... - Lars Blomberg, Mar 18 2012
LINKS
Michael S. Branicky, Table of n, a(n) for n = 1..1413
FORMULA
EXAMPLE
a(1) = floor(23/1) = 23.
a(2) = floor(456/23) = 19.
a(3) = floor(78910/456) = 173.
PROG
(Python)
def b(n): return int("".join(map(str, range((n-1)*n//2+1, n*(n+1)//2+1))))
def a(n): return b(n+1)//b(n)
print([a(n) for n in range(1, 44)]) # Michael S. Branicky, Jul 31 2022
CROSSREFS
KEYWORD
base,nonn
AUTHOR
Amarnath Murthy, Oct 30 2002
EXTENSIONS
a(7)-a(36) from Lars Blomberg, Mar 18 2012
a(37) and beyond from Michael S. Branicky, Jul 31 2022
STATUS
approved