OFFSET
1,1
LINKS
Andrew Howroyd, Table of n, a(n) for n = 1..1000
Eric Weisstein's World of Mathematics, Alkane Graph
Eric Weisstein's World of Mathematics, Vertex Cut
Index entries for linear recurrences with constant coefficients, signature (14,-57,76,-32).
FORMULA
a(n) = 4*8^n - (49*4^n + 6*n - 13)/9. - Andrew Howroyd, Apr 23 2023
a(n) = 14*a(n-1) - 57*a(n-2) + 76*a(n-3) - 32*a(n-4) for n >= 5. - Pontus von Brömssen, Apr 23 2023
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Eric W. Weisstein, Apr 23 2023
EXTENSIONS
Terms a(8) and beyond from Andrew Howroyd, Apr 23 2023
STATUS
approved