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A026396 Sum{T(i,j)}, 0<=j<=i, 0<=i<=n, where T is the array in A026386. 0
3, 7, 17, 37, 87, 187, 437, 937, 2187, 4687, 10937, 23437, 54687, 117187, 273437, 585937, 1367187, 2929687, 6835937, 14648437, 34179687, 73242187, 170898437, 366210937, 854492187, 1831054687, 4272460937, 9155273437 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

LINKS

Table of n, a(n) for n=0..27.

Index to sequences with linear recurrences with constant coefficients, signature (1,5,-5)

FORMULA

G.f.: [3+4x-5x^2]/[(1-x)(1-5x^2)]. - Ralf Stephan, Apr 30 2004

CROSSREFS

Sequence in context: A033489 A178941 A178155 * A176502 A141199 A003478

Adjacent sequences:  A026393 A026394 A026395 * A026397 A026398 A026399

KEYWORD

nonn,changed

AUTHOR

Clark Kimberling

STATUS

approved

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Last modified May 24 20:57 EDT 2013. Contains 225631 sequences.