The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A277464

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Showing entries 1-10 | older changes

Expansion of e.g.f. cosh(x)/(1 + LambertW(-x)).
(history; published version)

#18 by Alois P. Heinz at Wed Feb 15 11:08:37 EST 2023

STATUS

proposed

approved

#17 by Seiichi Manyama at Wed Feb 15 08:52:33 EST 2023

STATUS

editing

proposed

#16 by Seiichi Manyama at Wed Feb 15 08:23:38 EST 2023

NAME

EExpansion of e.g.f.: cosh(x)/(1 + LambertW(-x)).

#15 by Seiichi Manyama at Wed Feb 15 08:22:12 EST 2023

FORMULA

a(n) = Sum_{k=0..floor(n/2)} (n-2*k)^(n-2*k) * binomial(n,2*k). - Seiichi Manyama, Feb 15 2023

#14 by Seiichi Manyama at Wed Feb 15 08:20:38 EST 2023

PROG

(PARI) a(n) = sum(k=0, n\2, (n-2*k)^(n-2*k)*binomial(n, 2*k)); \\ _Seiichi Manyama_, Feb 15 2023

#13 by Seiichi Manyama at Wed Feb 15 08:18:26 EST 2023

PROG

(PARI) a(n) = sum(k=0, n\2, (n-2*k)^(n-2*k)*binomial(n, 2*k));

STATUS

approved

editing

#12 by Bruno Berselli at Wed Nov 08 02:31:22 EST 2017

STATUS

reviewed

approved

#11 by Michel Marcus at Wed Nov 08 00:47:55 EST 2017

STATUS

proposed

reviewed

#10 by Jon E. Schoenfield at Tue Nov 07 23:07:29 EST 2017

STATUS

editing

proposed

#9 by Jon E. Schoenfield at Tue Nov 07 23:07:25 EST 2017

NAME

E.g.f.: cosh(x)/(1 + LambertW(-x)).

STATUS

proposed

editing