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A193848
Triangular array: (1/2)*A193846.
3
1, 2, 4, 4, 14, 13, 8, 40, 68, 40, 16, 104, 256, 284, 121, 32, 256, 824, 1336, 1094, 364, 64, 608, 2416, 5144, 6196, 4010, 1093, 128, 1408, 6656, 17536, 27824, 26608, 14216, 3280, 256, 3200, 17536, 55040, 108256, 136688, 108256, 49208, 9841, 512
OFFSET
0,2
LINKS
Andrew Howroyd, Table of n, a(n) for n = 0..1325 (rows 0..50)
FORMULA
G.f.: 1/(1 - 2*(1 + 2*y)*x + y*(2 + 3*y)*x^2). - Andrew Howroyd, Feb 18 2024
EXAMPLE
Triangle begins:
1;
2, 4;
4, 14, 13;
8, 40, 68, 40;
16, 104, 256, 284, 121;
32, 256, 824, 1336, 1094, 364;
64, 608, 2416, 5144, 6196, 4010, 1093;
128, 1408, 6656, 17536, 27824, 26608, 14216, 3280;
...
MATHEMATICA
(See A193846.)
PROG
(PARI) T(n)={[Vecrev(p) | p<-Vec(1/(1 - 2*(1 + 2*y)*x + y*(2 + 3*y)*x^2) + O(x*x^n))]}
{ my(A=T(10)); for(i=1, #A, print(A[i])) } \\ Andrew Howroyd, Feb 18 2024
CROSSREFS
Cf. A193846.
Sequence in context: A341235 A363649 A263023 * A371254 A218974 A221706
KEYWORD
nonn,tabl
AUTHOR
Clark Kimberling, Aug 07 2011
STATUS
approved