The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A022406 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
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A022406

a(0)=3, a(1)=7; thereafter a(n) = a(n-1) + a(n-2) + 1.
(history; published version)

#44 by Andrew Howroyd at Sat Feb 01 14:59:37 EST 2025

STATUS

reviewed

approved

#43 by Stefano Spezia at Sat Feb 01 14:56:30 EST 2025

STATUS

proposed

reviewed

#42 by Michel Marcus at Sat Feb 01 14:53:16 EST 2025

STATUS

editing

proposed

#41 by Michel Marcus at Sat Feb 01 14:53:10 EST 2025

PROG

(PARI) fora(n) =0, 40, print1( 4*fibonacci(n+2) -1, ", ")) ; \\ G. C. Greubel, Mar 01 2018

STATUS

proposed

editing

#40 by Stefano Spezia at Sat Feb 01 14:30:24 EST 2025

STATUS

editing

proposed

#39 by Stefano Spezia at Sat Feb 01 14:29:53 EST 2025

FORMULA

a(n+1) - a(n) = A022087(n+1). (End)

(End)

E.g.f.: 4*exp(x/2)*(5*cosh(sqrt(5)*x/2) + 3*sqrt(5)*sinh(sqrt(5)*x/2))/5 - exp(x). - Stefano Spezia, Feb 01 2025

STATUS

proposed

editing

#38 by Robert C. Lyons at Sat Feb 01 13:45:44 EST 2025

STATUS

editing

proposed

#37 by Robert C. Lyons at Sat Feb 01 13:45:42 EST 2025

PROG

(Magma) [4*Fibonacci(n+2) - 1: n i in [0..40]]; // G. C. Greubel, Mar 01 2018

STATUS

approved

editing

#36 by Andrey Zabolotskiy at Wed Aug 24 19:40:40 EDT 2022

STATUS

proposed

approved

#35 by Kevin Ryde at Wed Aug 24 19:15:45 EDT 2022

STATUS

editing

proposed