A254401 a(n) = floor(b(n)), where b(n) = b(n-1)^(3/2), b(1) = 3.

3, 5, 11, 40, 260, 4198, 272087, 141926645, 1690814280107, 2198588037458589676, 3259986420078467245024559414, 186133132558073401497122370072981441415771, 80303695148132102394972761166781400472084090796880334009212493

Offset

1,1

Links

Table of n, a(n) for n=1..13.

Formula

a(n) = floor(3^((3/2)^(n-1))).

Mathematica

Floor[RecurrenceTable[{a[1]==3, a[n]==a[n-1]^(3/2)}, a, {n, 1, 15}]]
Table[Floor[3^((3/2)^(n-1))], {n, 1, 15}
Floor[NestList[#^(3/2)&, 3, 15]] (* Harvey P. Dale, Aug 11 2021 *)]

Crossrefs

Cf. A254402.

Sequence in context: A254402 A060881 A035345 * A174915 A162250 A055511

Adjacent sequences: A254398 A254399 A254400 * A254402 A254403 A254404

Keyword

nonn,easy

Author

Vaclav Kotesovec, Jan 30 2015

Status

approved