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A130494 Row sums of triangle A130478. 1
1, 4, 11, 37, 163, 907, 6067, 47107, 415027, 4084147, 44363827, 526994227, 6793931827, 94451224627, 1408352613427, 22418320792627, 379413423256627, 6802709918872627, 128803497755800627, 2568107879638168627, 53780695151756440627, 1180214324937540760627 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..22.

FORMULA

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,...).

EXAMPLE

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.

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

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

CROSSREFS

Cf. A130495, A001048, A130478.

Sequence in context: A247816 A017939 A282702 * A027573 A149246 A149247

Adjacent sequences:  A130491 A130492 A130493 * A130495 A130496 A130497

KEYWORD

nonn

AUTHOR

Gary W. Adamson, May 31 2007

EXTENSIONS

More terms from Alois P. Heinz, Dec 02 2018

STATUS

approved

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Last modified May 14 16:48 EDT 2021. Contains 343898 sequences. (Running on oeis4.)