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A276530 a(n) = (a(n-1) * a(n-5) + a(n-3)^3) / a(n-6), a(0) = a(1) = ... = a(5) = 1. 2
1, 1, 1, 1, 1, 1, 2, 3, 4, 12, 39, 142, 1077, 21209, 779449, 106636837, 245010524697, 3336696488691229, 1125981890791313205482, 693480182652378523758257457499, 47660918720485535883730945247863294175948, 13387114027268508450553229985503810242341235794343085252 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,7

LINKS

Seiichi Manyama, Table of n, a(n) for n = 0..30

MATHEMATICA

RecurrenceTable[{a[n] == (a[n - 1] a[n - 5] + a[n - 3]^3)/a[n - 6], a[0] == a[1] == a[2] == a[3] == a[4] == a[5] == 1}, a, {n, 0, 21}] (* Michael De Vlieger, Nov 16 2016 *)

PROG

(Ruby)

def A(k, m, n)

  a = Array.new(2 * k, 1)

  ary = [1]

  while ary.size < n + 1

    i = a[-1] * a[1] + a[k] ** m

    break if i % a[0] > 0

    a = *a[1..-1], i / a[0]

    ary << a[0]

  end

  ary

end

def A276530(n)

  A(3, 3, n)

end

CROSSREFS

Cf. A276529, A275173, A102276.

Sequence in context: A173446 A053350 A165302 * A251411 A117342 A303385

Adjacent sequences:  A276527 A276528 A276529 * A276531 A276532 A276533

KEYWORD

nonn

AUTHOR

Seiichi Manyama, Nov 16 2016

STATUS

approved

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Last modified July 21 22:02 EDT 2019. Contains 325210 sequences. (Running on oeis4.)