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!)
 A336452 Triangle read by rows, the Riordan square of the number of achiral m-color cyclic compositions of n (A308747). T(n,k) for 1 <= k <= n. 0
 1, 3, 3, 6, 15, 9, 13, 49, 63, 27, 23, 137, 276, 243, 81, 44, 338, 969, 1323, 891, 243, 73, 782, 2950, 5589, 5778, 3159, 729, 131, 1695, 8161, 20097, 28485, 23733, 10935, 2187, 210, 3545, 20966, 64557, 117801, 133569, 93312, 37179, 6561 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS See the link and A321620 for more information about the Riordan square transform. LINKS Petros Hadjicostas, Generalized colored circular palindromic compositions, Moscow Journal of Combinatorics and Number Theory, 9(2) (2020), 173-186. Peter Luschny, The Riordan Square Transform, 2018. EXAMPLE [1] [   1] [2] [   3,    3] [3] [   6,   15,     9] [4] [  13,   49,    63,    27] [5] [  23,  137,   276,   243,     81] [6] [  44,  338,   969,  1323,    891,    243] [7] [  73,  782,  2950,  5589,   5778,   3159,   729] [8] [ 131, 1695,  8161, 20097,  28485,  23733, 10935,  2187] [9] [ 210, 3545, 20966, 64557, 117801, 133569, 93312, 37179, 6561] PROG (SageMath) # using riordan_square_array from A321620, A308747. riordan_square_array([1, 3, 6, 13, 23, 44, 73, 131, 210]) CROSSREFS Cf. A308747, A321620. Sequence in context: A110523 A145597 A143418 * A092370 A245796 A006807 Adjacent sequences:  A336449 A336450 A336451 * A336453 A336454 A336455 KEYWORD nonn,tabl AUTHOR Peter Luschny, Aug 09 2020 STATUS approved

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 June 15 00:00 EDT 2021. Contains 345041 sequences. (Running on oeis4.)