A133021 Irregular triangle read by rows: row n lists divisors of n-th Fibonacci number A000045(n).

1, 1, 1, 2, 1, 3, 1, 5, 1, 2, 4, 8, 1, 13, 1, 3, 7, 21, 1, 2, 17, 34, 1, 5, 11, 55, 1, 89, 1, 2, 3, 4, 6, 8, 9, 12, 16, 18, 24, 36, 48, 72, 144, 1, 233, 1, 13, 29, 377, 1, 2, 5, 10, 61, 122, 305, 610, 1, 3, 7, 21, 47, 141, 329, 987, 1, 1597

Offset: 1

Author

Omar E. Pol, Oct 26 2007

Keywords

• nonn
• tabf
• look

Examples

			Triangle begins:
    [ 1 ],
    [ 1 ],
    [ 1, 2 ],
    [ 1, 3 ],
    [ 1, 5 ],
    [ 1, 2, 4, 8 ],
    [ 1, 13 ],
    [ 1, 3, 7, 21 ],
    [ 1, 2, 17, 34 ],
    [ 1, 5, 11, 55 ],
    [ 1, 89 ],
		

Links

• T. D. Noe, Rows n = 1..100 of irregular triangle, flattened

Crossrefs

Cf. A000045 (Fibonacci numbers), A027750, A063375 (row lengths).

Programs

Magma

/* As triangle */ [Divisors(Fibonacci(n)): n in [1..30]]; // Vincenzo Librandi, Nov 15 2024

Mathematica

Flatten[Table[Divisors[Fibonacci[n]], {n, 20}]] (* T. D. Noe, Mar 14 2014 *)