A298688 a(n) is the least i such that Fibonacci(i) is divisible by i+k for all k=0..n.

1, 60, 60, 540, 13440, 13440, 329400, 175472640, 50238568800

Offset

0,2

Comments

a(0)..a(5) are first terms of sequences A023172, A217738, A298684, A298685, A298686, A298687.

Links

Table of n, a(n) for n=0..8.

Example

Least i such that Fibonacci(i) is divisible by i and i+1 (cf. A217738) is i=60, therefore a(1)=60.
Least i such that Fibonacci(i) is divisible by i, i+1, ..., i+5 (cf. A298687) is i=13440, therefore a(5)=13440.

Crossrefs

Cf. A000045, A023172, A217738, A221018, A225219, A298684, A298685, A298686, A298687.

Sequence in context: A051713 A060225 A124901 * A247437 A266916 A256749

Adjacent sequences: A298685 A298686 A298687 * A298689 A298690 A298691

Keyword

nonn,hard,more

Author

Alex Ratushnyak, Jan 24 2018

Extensions

a(7) from Alois P. Heinz, Jan 25 2018

a(6) inserted by Chai Wah Wu, Jan 26 2018

a(8) from Silvester Resnik, May 18 2018

Status

approved