A378234 From higher-order arithmetic progressions: Corrected version of A259461.

40, 5000, 472500, 43218000, 4148928000, 432081216000, 49509306000000, 6275893932000000, 881135508052800000, 136878615942868800000, 23474682634201999200000, 4432282735129048800000000, 918537831584839065600000000, 208281986149676045967360000000, 51516317681413623440962560000000

Offset

0,1

Comments

Only the first 5 terms of A259461 are correct. - R. J. Mathar, Jul 14 2015

"2 over n!" on page 13 in the Dienger article is A006472; A_3 is A001303.

Links

Table of n, a(n) for n=0..14.

Karl Dienger, Beiträge zur Lehre von den arithmetischen und geometrischen Reihen höherer Ordnung, Jahres-Bericht Ludwig-Wilhelm-Gymnasium Rastatt, Rastatt, 1910. [Annotated scanned copy]

Formula

D-finite with recurrence: -2*n*(n+2)*a(n) + (n+4)^3*(n+5)*a(n-1) = 0.

a(n) = (n+5)!*(n+4)!^3 / (1296*2^(n+4)*n!^2*(n+2)*(n+1)).

Maple

rV := proc(n, a, d)
    n*(n+1)/2*a+(n-1)*n*(n+1)/6*d;
end proc:
A259461 := proc(n)
    mul(rV(i, a, d), i=1..n+3) ;
    coeftayl(%, d=0, 3) ;
    coeftayl(%, a=0, n) ;
end proc:
seq(A259461(n), n=1..5) ; # R. J. Mathar, Jul 14 2015

Crossrefs

Cf. A001303, A006472, A259459, A259460, A259461.

Sequence in context: A229604 A045502 A347854 * A259461 A229692 A270053

Adjacent sequences: A378231 A378232 A378233 * A378235 A378236 A378237

Keyword

nonn,new

Author

Georg Fischer, Dec 16 2024

Status

approved