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A221639 5^(5n+1) + 4^(5n+2) + 3^(5n). 1
22, 32252, 65664390, 169782108716, 494432831031942, 1508131365182857052, 4675059823042234224390, 14570804744329875486495116, 45494077913917911421604180742, 142128354195602915965174073201852, 444109492260384165827568467076384390 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

COMMENTS

All terms are multiples of 22.

REFERENCES

Hugo Steinhaus: Studentenfutter, Urania, Leipzig 1991, #5

LINKS

Table of n, a(n) for n=0..10.

Index entries for linear recurrences with constant coefficients, signature (4392,-4208207,777600000)

FORMULA

G.f. -22*(1-2926*x+754280*x^2) / ( (243*x-1)*(3125*x-1)*(1024*x-1) ). - R. J. Mathar, Aug 09 2013

PROG

(Haskell)

a221639 n = 5 ^ (5 * n + 1) + 4 ^ (5 * n + 2) + 3 ^ (5 * n)

(PARI) a(n)=5^(5*n+1)+4^(5*n+2)+243^n \\ Charles R Greathouse IV, Aug 09 2013

CROSSREFS

Subsequence of A008593.

Cf. A000244, A000302, A000351.

Sequence in context: A127486 A232847 A191946 * A078398 A280812 A060619

Adjacent sequences:  A221636 A221637 A221638 * A221640 A221641 A221642

KEYWORD

nonn,easy

AUTHOR

Reinhard Zumkeller, Aug 08 2013

STATUS

approved

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Last modified August 9 04:23 EDT 2022. Contains 356016 sequences. (Running on oeis4.)