The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A104990 Matrix cube of triangle A104980. 2
 1, 3, 1, 15, 6, 1, 93, 39, 9, 1, 675, 285, 75, 12, 1, 5577, 2331, 657, 123, 15, 1, 51555, 21153, 6207, 1269, 183, 18, 1, 526809, 211227, 63549, 13743, 2181, 255, 21, 1, 5895819, 2304321, 704319, 158325, 26739, 3453, 339, 24, 1, 71733585, 27291843 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 0,2 COMMENTS Triangular matrix A104980 satisfies: SHIFT_LEFT(column 0 of A104980^p) = p*(column p+1 of A104980) for p>=0. LINKS FORMULA T(n+1, 0) = 3*A104980(n+4, 4) for n>=0. EXAMPLE Triangle begins: 1; 3,1; 15,6,1; 93,39,9,1; 675,285,75,12,1; 5577,2331,657,123,15,1; 51555,21153,6207,1269,183,18,1; 526809,211227,63549,13743,2181,255,21,1; 5895819,2304321,704319,158325,26739,3453,339,24,1; 71733585,27291843,8424813,1947711,343641,47355,5145,435,27,1; ... PROG (PARI) T(n, k)=if(n

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

Last modified September 23 22:32 EDT 2020. Contains 337315 sequences. (Running on oeis4.)