A362445 - OEIS

A362445

a(n) = (n+1)^4 written in base n.

1111111111111111, 1010001, 100111, 21301, 20141, 15041, 14641, 14641, 14641, 14641, 14641, 14641, 14641, 14641, 14641, 14641, 14641, 14641, 14641, 14641, 14641, 14641, 14641, 14641, 14641, 14641, 14641, 14641, 14641, 14641, 14641, 14641, 14641, 14641, 14641, 14641, 14641

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OFFSET

1,1

COMMENTS

a(n) = 14641 for n >= 7.

REFERENCES

GCHQ, The GCHQ Puzzle Book, Penguin, 2016. See pages 108 and 300.

LINKS

Table of n, a(n) for n=1..37.

Index entries for linear recurrences with constant coefficients, signature (1).

FORMULA

G.f.: x*(400*x^6 + 5100*x^5 + 1160*x^4 + 78810*x^3 + 909890*x^2 + 1111111110101110*x - 1111111111111111)/(x - 1). - Chai Wah Wu, Apr 23 2023