A217019 First differences of A128301.

2, 6, 8, 23, 16, 34, 24, 50, 89, 36, 115, 80, 49, 101, 149, 190, 58, 202, 140, 79, 231, 159, 270, 371, 193, 103, 216, 113, 212, 804, 260, 391, 151, 667, 148, 431, 472, 318, 486, 507, 153, 870, 169, 365, 185, 1145, 1214, 405, 207, 434, 614, 218, 1135, 703, 721

Offset

1,1

Comments

The sequence is of chaotic behavior and unbound. Exactly as in A050216 (see comment by T. D. Noe over there), the lines in the graph correspond to prime gaps of 2, 4, 6,...

Links

Zak Seidov, Table of n, a(n) for n = 1..10000

Formula

a(n) = A165144(n) + 1. - Flávio V. Fernandes, Nov 19 2020

Crossrefs

Cf. A000879, A050216, A128301, A165144.

Cf. A001248 (primes squared), A001358 (semiprimes).

Sequence in context: A332348 A137072 A153802 * A240644 A344914 A068496

Adjacent sequences: A217016 A217017 A217018 * A217020 A217021 A217022

Keyword

nonn

Author

Zak Seidov, Sep 24 2012

Status

approved