login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A130494 Row sums of triangle A130478. 1

%I #6 Feb 21 2022 00:16:41

%S 1,4,11,37,163,907,6067,47107,415027,4084147,44363827,526994227,

%T 6793931827,94451224627,1408352613427,22418320792627,379413423256627,

%U 6802709918872627,128803497755800627,2568107879638168627,53780695151756440627,1180214324937540760627

%N Row sums of triangle A130478.

%F Row sums of triangle A130478. a(1) = 1; a(n), n>1 = n! + A130495(n-1). a(n) = n! + ((n-1)! + (n-2)!) + ((n-2)! + (n-3)!) + ... + (1! + 1). a(n) = n! + sum of first (n-1) terms of A001048 in reverse, where A001048 = (2, 3, 8, 30, 144, ...).

%e a(5) = 163 sum of row 5 terms of triangle A130478: (120 + 30 + 8 + 3 + 2); where (30, 8, 3, 2) = the first 4 reversed terms of A001048.

%e a(5) = 163 = 5! + A130495(4) = 120 + 43.

%e a(5) = 163 = 5! + (4! + 3!) + (3! + 2!) + (2! + 1!) + (1! + 1).

%Y Cf. A130495, A001048, A130478.

%K nonn

%O 1,2

%A _Gary W. Adamson_, May 31 2007

%E More terms from _Alois P. Heinz_, Dec 02 2018

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified April 25 06:14 EDT 2024. Contains 371964 sequences. (Running on oeis4.)