A113842 a(n) = Prime(tribonacci(n)).

2, 2, 3, 7, 17, 41, 89, 193, 419, 859, 1759, 3607, 7247, 14551, 28793, 56893, 111863, 218839, 426583, 827851, 1603769, 3097121, 5966629, 11470489, 22004617, 42142883, 80570929, 153802489, 293176621, 558130051, 1061238359, 2015569583

Offset

2,1

Comments

This is to the tribonacci sequence what A030427 is to the Fibonacci sequence.

Links

Chai Wah Wu, Table of n, a(n) for n = 2..68

Formula

a(n) = A000040(A000073(n)).

Example

a(2) = prime(tribonacci(2)) = prime(1) = 2.
a(3) = prime(tribonacci(3)) = prime(1) = 2.
a(4) = prime(tribonacci(4)) = prime(2) = 3.
a(5) = prime(tribonacci(5)) = prime(4) = 7.
a(6) = prime(tribonacci(6)) = prime(7) = 17.

Crossrefs

Cf. A000040, A000073, A030427.

Sequence in context: A032236 A128776 A117387 * A032161 A265801 A098738

Adjacent sequences: A113839 A113840 A113841 * A113843 A113844 A113845

Keyword

easy,nonn

Author

Jonathan Vos Post, Jan 23 2006

Status

approved