The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A056221 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
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A056221

Image of primes (A000040) under "little Hankel" transform that sends [c_0, c_1, ...] to [d_0, d_1, ...] where d_n = c_n^2 - c_{n+1}*c_{n-1}.
(history; published version)

#33 by OEIS Server at Tue Jul 16 15:56:07 EDT 2024

LINKS

Stefano Spezia, <a href="/A056221/b056221_1.txt">Table of n, a(n) for n = 1..10000</a>

#32 by Michael De Vlieger at Tue Jul 16 15:56:07 EDT 2024

STATUS

reviewed

approved

Discussion

Tue Jul 16

15:56

OEIS Server: Installed first b-file as b056221.txt.

#31 by Peter Luschny at Tue Jul 16 15:51:16 EDT 2024

STATUS

proposed

reviewed

#30 by Stefano Spezia at Mon Jul 15 16:03:29 EDT 2024

STATUS

editing

proposed

#29 by Stefano Spezia at Mon Jul 15 04:30:32 EDT 2024

LINKS

Stefano Spezia, <a href="/A056221/b056221_1.txt">Table of n, a(n) for n = 1..10000</a>

#28 by Stefano Spezia at Mon Jul 15 03:39:20 EDT 2024

CROSSREFS

Cf. A000040, A046868, A056222, A233671, A342567.

#27 by Stefano Spezia at Mon Jul 15 03:32:32 EDT 2024

CROSSREFS

Cf. A000040, A046868, A233671, A342567.

#26 by Stefano Spezia at Mon Jul 15 03:03:22 EDT 2024

MATHEMATICA

a[n_]:=Prime[n+1]^2-Prime[n]Prime[n+2]; Array[a, 50] (* Stefano Spezia, Jul 15 2024 *)

STATUS

approved

editing

#25 by Peter Luschny at Mon Jun 21 06:05:40 EDT 2021

STATUS

reviewed

approved

#24 by Joerg Arndt at Mon Jun 21 03:07:58 EDT 2021

STATUS

proposed

reviewed