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A217019
First differences of A128301.
2
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,...
FORMULA
a(n) = A165144(n) + 1. - Flávio V. Fernandes, Nov 19 2020
CROSSREFS
Cf. A001248 (primes squared), A001358 (semiprimes).
Sequence in context: A332348 A137072 A153802 * A240644 A344914 A068496
KEYWORD
nonn
AUTHOR
Zak Seidov, Sep 24 2012
STATUS
approved