A068136 First Fibonacci number beginning with concatenation of first n natural numbers.

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

Cf. A000045, A110486.

Sequence in context: A061128 A228510 A237247 * A362966 A236826 A135495

Adjacent sequences: A068133 A068134 A068135 * A068137 A068138 A068139

Keyword

base,nonn,bref

Author

Amarnath Murthy, Feb 22 2002

Status

approved