A076007 Seventh column of triangle A075503.

1, 224, 29568, 3010560, 262090752, 20558512128, 1498264109056, 103450998210560, 6857541631868928, 440486826671603712, 27603867324502769664, 1696189816779885772800, 102592999712419955605504

Offset

0,2

Comments

The e.g.f. given below is Sum_{m=0..6} (A075513(7,m)*exp(8*(m+1)*x))/6!.

Links

Michael De Vlieger, Table of n, a(n) for n = 0..570

Formula

a(n) = A075503(n+7, 7) = (8^n)*S2(n+7, 7) with S2(n, m) := A008277(n, m) (Stirling2).

a(n) = Sum_{m=0..6} (A075513(7, m)*((m+1)*8)^n)/6!.

G.f.: 1/Product_{k=1..7} (1 - 8*k*x).

E.g.f.: (d^7/dx^7)(((exp(8*x)-1)/8)^7)/7! = (exp(8*x) - 384*exp(16*x) + 10935*exp(24*x) - 81920*exp(32*x) + 234375*exp(40*x) - 279936*exp(48*x) + 117649*exp(56*x))/6!.

Mathematica

With[{m = 7}, Array[8^(# - m) StirlingS2[#, m] &, 13, m]] (* Michael De Vlieger, Dec 24 2017, after Indranil Ghosh at A075503 *)

Crossrefs

Cf. A076006.

Sequence in context: A229459 A051367 A280960 * A280672 A204977 A204704

Adjacent sequences: A076004 A076005 A076006 * A076008 A076009 A076010

Keyword

nonn,easy

Author

Wolfdieter Lang, Oct 02 2002

Status

approved