A252583 a(n) = a(n-1)^3 + a(n-2)^6, a(0) = 0, a(1) = 1.

0, 1, 1, 2, 9, 793, 499208698, 124407462491481058208408441, 1925481259009966865844002992692350885969632796673886663638811207308483184039785

Offset

0,4

Links

Table of n, a(n) for n=0..8.

Formula

a(n) ~ c^(3^n), where c = 1.0278548747403916038597317519446646178420852580529382519451043895427806227... . - Vaclav Kotesovec, Dec 18 2014

Mathematica

RecurrenceTable[{a[0]==0, a[1]==1, a[n] == a[n-1]^3 + a[n-2]^6}, a, {n, 0, 10}]
nxt[{a_, b_}]:={b, b^3+a^6}; NestList[nxt, {0, 1}, 10][[All, 1]] (* Harvey P. Dale, Jul 22 2022 *)

Crossrefs

Cf. A000278, A076725, A252584.

Sequence in context: A262089 A112961 A114953 * A253604 A067691 A062840

Adjacent sequences: A252580 A252581 A252582 * A252584 A252585 A252586

Keyword

nonn

Author

Vaclav Kotesovec, Dec 18 2014

Status

approved