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A297628 Seidel's triangle generating A006846 read by rows, T(n,k) for n>=0 and 0<=k<=n. 2
1, 1, 1, 1, 2, 2, 1, 5, 7, 7, 1, 20, 34, 41, 41, 1, 137, 253, 335, 376, 376, 1, 1478, 2818, 3905, 4657, 5033, 5033, 1, 22925, 44371, 62999, 77722, 87788, 92821, 92821, 1, 481448, 939970, 1354121, 1705273, 1978703, 2164345, 2257166, 2257166 (list; table; graph; refs; listen; history; text; internal format)
OFFSET
0,5
LINKS
EXAMPLE
Triangle starts:
0: [1]
1: [1, 1]
2: [1, 2, 2]
3: [1, 5, 7, 7]
4: [1, 20, 34, 41, 41]
5: [1, 137, 253, 335, 376, 376]
6: [1, 1478, 2818, 3905, 4657, 5033, 5033]
7: [1, 22925, 44371, 62999, 77722, 87788, 92821, 92821]
8: [1, 481448, 939970, 1354121, 1705273, 1978703, 2164345, 2257166, 2257166]
PROG
(Julia)
function A297628Triangle(len::Int)
A = fill(BigInt(0), len+1); A[1] = 1
for n in 1:len
for k in n:-1:2 A[k] += A[k+1] end
for k in 2: 1:n A[k] += A[k-1] end
println(A[1:n])
end
end
println(A297628Triangle(9))
CROSSREFS
T(n,1) = A297629(n).
T(n,n) = A006846(n).
Row sums are A297630.
Sequence in context: A162382 A325580 A127082 * A342722 A344528 A329429
KEYWORD
nonn,tabl
AUTHOR
Peter Luschny, Jan 02 2018
STATUS
approved

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