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A129286 a(n) = A129152(n) / 5^5, where A129152 is the trajectory of 5^6 under A003415, the arithmetic derivative. 6
5, 6, 11, 12, 28, 60, 152, 388, 780, 2036, 4076, 8156, 16316, 32636, 66232, 169612, 339228, 1244808, 4856004, 14568120, 56648484, 190791072, 866874960, 4084880112, 16342519392, 73816544592, 305811402048, 1732931293824, 10145637246528, 52715820454848 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

LINKS

Table of n, a(n) for n=0..29.

FORMULA

a(n+1) = A129283(a(n)), a(0) = 5.

a(n) = A090635(n+3) / 4, i.e., the trajectory of 20 under A003415, divided by the common factor 4. - M. F. Hasler, Nov 27 2019

PROG

(Haskell)

a129286 n = a129286_list !! n

a129286_list = iterate a129283 5  -- Reinhard Zumkeller, Nov 01 2013

CROSSREFS

Cf. A129284, A129285, A051674.

Sequence in context: A047264 A277095 A190895 * A083450 A136974 A101187

Adjacent sequences:  A129283 A129284 A129285 * A129287 A129288 A129289

KEYWORD

nonn,changed

AUTHOR

Reinhard Zumkeller, Apr 07 2007

STATUS

approved

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Last modified December 10 20:48 EST 2019. Contains 329909 sequences. (Running on oeis4.)