A091265 Take sequence of prime numbers (A000040) and reverse successive subsequences of lengths 1,2,3,4,...

2, 5, 3, 13, 11, 7, 29, 23, 19, 17, 47, 43, 41, 37, 31, 73, 71, 67, 61, 59, 53, 107, 103, 101, 97, 89, 83, 79, 151, 149, 139, 137, 131, 127, 113, 109, 197, 193, 191, 181, 179, 173, 167, 163, 157, 257, 251, 241, 239, 233, 229, 227, 223, 211, 199, 317, 313, 311, 307

Offset

1,1

Links

Robert Israel, Table of n, a(n) for n = 1..10000

Formula

a(n) = A000040(A038722(n)). - M. F. Hasler, Aug 24 2014

Maple

S:= ListTools:-PartialSums([$1..20]):
P:= [seq(ithprime(i), i=1..S[-1])]:
map(op, [[P[1]], seq(ListTools:-Reverse(P[S[i]+1..S[i+1]]), i=1..nops(S)-1)]); # Robert Israel, Sep 04 2017

Crossrefs

Cf. A000040, A038722.

Sequence in context: A242171 A254790 A353717 * A262373 A028415 A211306

Adjacent sequences: A091262 A091263 A091264 * A091266 A091267 A091268

Keyword

easy,nonn

Author

Felix Tubiana, Feb 23 2004

Extensions

Offset changed from 0 to 1 by M. F. Hasler, Aug 24 2014

Status

approved