A297965 a(n) = Fibonacci(binomial(n+3, 3)).

1, 3, 55, 6765, 9227465, 225851433717, 160500643816367088, 5358359254990966640871840, 13598018856492162040239554477268290, 4244200115309993198876969489421897548446236915, 263621064469290555679241849789653324393054271110084140201023

Offset: 0

Author

Vincenzo Librandi, Jan 10 2018

Keywords

• nonn
• easy

Comments

Fourth diagonal of A045995.

Crossrefs

Cf. A000045, A000292, A045995, A081667.

Programs

Magma

[Fibonacci(Binomial(n+3,3)): n in [0..20]];

Mathematica

Table[Fibonacci[Binomial[n + 3, 3]], {n, 0, 20}]

PARI

a(n) = fibonacci(binomial(n+3, 3)) \\ Felix Fröhlich, Jan 12 2018

Formula

a(n) = A000045(A000292(n+1)) = A045995(n+3, 3).