A100466 Semiprimes of special form: sum of an integer k and the k-th semiprime.

14, 21, 34, 46, 62, 69, 74, 77, 93, 115, 122, 129, 141, 158, 161, 177, 187, 194, 206, 215, 221, 289, 291, 302, 326, 329, 334, 346, 361, 382, 391, 393, 398, 403, 451, 471, 481, 502, 535, 543, 581, 583, 629, 635, 655, 674, 698, 706, 713, 723, 734, 802, 813

Offset

1,1

Comments

This is the semiprime analog of A061068.

Links

Table of n, a(n) for n=1..53.

Eric Weisstein, World of Mathematics, Semiprime.

Formula

a(n) = A100915(n) + A100916(n) = A100915(n) + A001358(A100915(n)).

Example

a(3) = 34 because 34 is the third semiprime appearing in A100493.

Crossrefs

Cf. A001358, A061068, A100493, A100467, A100915, A100916.

Sequence in context: A263990 A253810 A084995 * A100467 A082802 A258217

Adjacent sequences: A100463 A100464 A100465 * A100467 A100468 A100469

Keyword

easy,nonn

Author

Jonathan Vos Post, Nov 20 2004

Extensions

Edited, corrected and extended by Ray Chandler, Nov 26 2004

Status

approved