A048122 a(1) = 1, a(2) = 2, a(n) = a(n-1)^3 - a(n-2)^3.

1, 2, 7, 335, 37595032, 53136308104856854277393, 150028625136232090492356612601560283583272160844416809510162344944689

Offset

1,2

Comments

Next terms are 205 and 614 digits long.

Links

Table of n, a(n) for n=1..7.

Mathematica

RecurrenceTable[{a[1]==1, a[2]==2, a[n]==a[n-1]^3-a[n-2]^3}, a, {n, 8}] (* Harvey P. Dale, Mar 20 2013 *)

Crossrefs

Cf. A048112.

Sequence in context: A137666 A137665 A128466 * A144787 A118910 A081505

Adjacent sequences: A048119 A048120 A048121 * A048123 A048124 A048125

Keyword

nonn,easy

Author

David Johnson-Davies

Extensions

More terms from Patrick De Geest, Jun 15 1999

Status

approved