1123581321 

1.This is the Fibonacci series..
Start with 1 and 1
Add 1 and 1 to get 2
Add 1 and 2 to get 3
Add 2 and 3 to get 5 etc..

2.Fibonacci and the original problem about rabbits where the series first appears, the family trees of cows and bees, the golden ratio and the Fibonacci series, the Fibonacci Spiral and sea shell shapes, branching plants, flower petal and seeds, leaves and petal arrangements, on pineapples and in apples, pine cones and leaf arrangements. All involve the Fibonacci numbers.

ACCOUNT NUMBER:
1123581321

It took him an instant, but when Langdon spotted it, he knew it was right.
The Fibonacci sequence
1-1-2-3-5-8-13-21

1123581321 by Gdogs McC & Natablanca D January 13, 2006

1123581321 

This is the Fibonacci sequence. It was use the Da Vinci cide

1-1-2-3-5-8-13-21 Robert Langdon used this to solve the Da Vinci Code. 1123581321

1123581321 by KSIsucks101 July 18, 2021

123581321

the thing you got in your homework and you had to get your dad to explain to you...

its called the Fibonacci sequence,.
if you don't under stand it, its very simple

1+2
=3
2+3
=5
3+5
=8
5+8
=13
8+13
=21

I probably made this to complicated but you get it right??

KID: Dad help me with my homework.
DAD: whats the sum
KID: 123581321??
DAD: oh that's the fibonacci sequence
KID: OK..

123581321 by bigman's man June 16, 2019