login
This site is supported by donations to The OEIS Foundation.
Logo

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A115189 Third diagonal (M=3) of triangle A115154 (called Y(3,1)). 0
1, 40, 466, 4870, 50053, 516256, 5371210, 56422444, 598180570, 6395471992, 68897550064, 747270112390, 8154207352045, 89462667739360, 986322436120690, 10922076949690180, 121428345789834430, 1354895520307913680 (list; graph; refs; listen; history; internal format)
OFFSET

0,2

FORMULA

a(n)= A115154(n+2,n+1), n>=0.

Recurrence: a(n)= b(n) - 6*b(n-1), with b(n):=A064063(n+3), n>=0.

G.f.: ((-3+9*x +2*x^2) + 3*(1-6*x)*c(3*x))/((2+x)*x^2), with the o.g.f. c(x) of A000108 (Catalan).

EXAMPLE

466 = a(2) = A064063(5) - 6*A064063(4) = 1606 - 6*190.

CROSSREFS

Sequence in context: A168192 A007772 A055750 * A186933 A177096 A202902

Adjacent sequences:  A115186 A115187 A115188 * A115190 A115191 A115192

KEYWORD

nonn,easy

AUTHOR

Wolfdieter Lang (wolfdieter.lang_AT_physik_DOT_uni-karlsruhe_DOT_de), Feb 23 2006

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Transforms | Puzzles | Hot | Classics
Recent Additions | More pages | Superseeker | Maintained by The OEIS Foundation Inc.

Content is available under The OEIS End-User License Agreement .

Last modified February 17 02:08 EST 2012. Contains 205978 sequences.