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A230868 Exponent of leading power of 5 in A230867(n). 2
1, 2, 4, 9, 15, 165, 317, 488442, 976572, 7629882822, 15258789078 (list; graph; refs; listen; history; text; internal format)
OFFSET

2,2

COMMENTS

The next term, a(13) = (5^((5^4+5^2+10)/4)+5^((5^2+5)/2)+2*5^2+12)/4 =

53455294201843912922810729343029637576303937602100973959238749843207972\

  81974260717340996507118688896298416137695328.

REFERENCES

Max A. Alekseyev, Donovan Johnson and N. J. A. Sloane, On Kaprekar's Junction Numbers, in preparation, 2017.

LINKS

Table of n, a(n) for n=2..12.

Max Alekseyev, Table of expressions for a(n), for n=2..100

EXAMPLE

A230867(5) = 1953134 = 5^9 + 9, so a(5) = 9.

CROSSREFS

Cf. A230867.

Sequence in context: A262232 A321410 A218912 * A014290 A337343 A015730

Adjacent sequences:  A230865 A230866 A230867 * A230869 A230870 A230871

KEYWORD

nonn,base,more

AUTHOR

N. J. A. Sloane, Nov 05 2013

EXTENSIONS

Terms a(9) onward from Max Alekseyev, Nov 05 2013

STATUS

approved

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Last modified July 25 19:05 EDT 2021. Contains 346291 sequences. (Running on oeis4.)