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A068136
First Fibonacci number beginning with concatenation of first n natural numbers.
2
1, 121393, 123227981463641240980692501505442003148737643593
OFFSET
1,2
COMMENTS
a(4) from Stefan Steinerberger, Mar 23 2006:
1234186992830549816205841085268501561864105707039431859628747\
6804120059682352435006104922273264452235757364972779787143538\
7638258620360945477670882854679721508770735822837045537333346\
8120468305816568893705054858509867081721197502375582187432960\
1251335387634785508612636054795931035033204474056156874331223\
129061384877424900885013229160797954
a(5) = A000045(49517) has 10349 digits. - Michael S. Branicky, Mar 30 2023
LINKS
Michael S. Branicky, Table of n, a(n) for n = 1..4
FORMULA
a(n) = A000045(A110486(n)). - Michel Marcus, Mar 31 2023
CROSSREFS
Sequence in context: A061128 A228510 A237247 * A362966 A236826 A135495
KEYWORD
base,nonn,bref
AUTHOR
Amarnath Murthy, Feb 22 2002
STATUS
approved