login
This site is supported by donations to The OEIS Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A255420 Ludic recurrence: Iterates of f(n) = A003309(n+1) starting from n=1. 3
1, 2, 3, 5, 11, 37, 181, 1361, 13927, 183871, 3005533, 59045717 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..11.

Donovan Johnson, Ludic numbers computed up to A003309(1236290) = 23000711

FORMULA

a(0) = 1; for n >= 1: a(n) = A003309(1+a(n-1)).

Other identities. For all n >= 0:

a(n) = A237126(A000225(n+1)).

a(n) = A255421(A007097(n)).

PROG

(Scheme, with memoization-macro definec)

(definec (A255420 n) (if (zero? n) 1 (A003309 (+ 1 (A255420 (- n 1))))))

(Haskell)

a255420 n = a255420_list !! n

a255420_list = iterate (a003309 . (+ 1)) 1

-- Reinhard Zumkeller, Feb 25 2015

CROSSREFS

Cf. A000225, A003309, A007097, A237126, A255421.

Sequence in context: A065510 A006721 A111289 * A127181 A323611 A113734

Adjacent sequences:  A255417 A255418 A255419 * A255421 A255422 A255423

KEYWORD

nonn,more

AUTHOR

Antti Karttunen, Feb 23 2015

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified November 21 14:18 EST 2019. Contains 329371 sequences. (Running on oeis4.)