A161926 Numbers occurring at least twice in A114381, in order of second appearance.

991, 104435, 712363, 1932085, 4816631, 2685019, 9180975, 13841797, 27084303, 10089313, 18865937, 72584313, 12235713, 29071365, 59499291, 27454813, 40349105, 18039791, 35811791, 26392813, 62173813, 79465965, 59293917

Offset

1,1

Comments

Numbers that have three occurrences in A114381 are not known to date.

Links

Klaus Brockhaus, Table of n, a(n) for n=1..222.

Example

A114381(11) = A114381(14) = 991; A114381(193) = A114381(348) = 104435; A114381(654) = A114381(2364) = 712363.

Prog

(PARI) /* gives terms and index of second occurrence */ {m=100000; S=[]; c=0; for(k=1, m, a=sum(j=prime(k), prime(k+1), prime(j)); S=setunion(S, Set(a)); d=#S; if(c==d, print(a, ", " , k), c=d))}

Crossrefs

Cf. A114381, A161927 (index of second occurrence).

Sequence in context: A255098 A155509 A093177 * A172698 A109149 A237991

Adjacent sequences: A161923 A161924 A161925 * A161927 A161928 A161929

Keyword

nonn

Author

Klaus Brockhaus, Jul 01 2009

Status

approved