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A360033 Table T(n,k), n >= 1 and k >= 0, read by antidiagonals, related to Jacobsthal numbers A001045. 0

%I #11 Feb 04 2023 11:10:11

%S 1,2,1,3,3,3,4,5,7,5,5,7,11,13,11,6,9,15,21,27,21,7,11,19,29,43,53,43,

%T 8,13,23,37,59,85,107,85,9,15,27,45,75,117,171,213,171,10,17,31,53,91,

%U 149,235,341,427,341,11,19,35,61,107,181,299,469

%N Table T(n,k), n >= 1 and k >= 0, read by antidiagonals, related to Jacobsthal numbers A001045.

%F T(n,k) = T(1,k) + (n-1)*2^k.

%F T(n,k) = 2*T(n, k-1) + (-1)^k.

%F T(n,k) = T(n-1,k) + 2^k.

%F T(n,k) = 2^k * n - A001045(k).

%F T(n,k) = T(n,k-1) +2*T(n,k-2).

%e The array T(n,k), for n <= 1 and k >= 0, begins:

%e n = 1: 1, 1, 3, 5, 11, 21, 43, ... -> A001045(k+1)

%e n = 2: 2, 3, 7, 13, 27, 53, 107, ... -> A048573(k)

%e n = 3: 3, 5, 11, 21, 43, 85, 171, ... -> A001045(k+3)

%e n = 4: 4, 7, 15, 29, 59, 117, 235, ... -> ?

%e n = 5: 5, 9, 19, 37, 75, 149, 299, ... -> A062092(k+1)

%e n = 6: 6, 11, 23, 45, 91, 181, 363, ... -> ?

%e n = 7: 7, 13, 27, 53, 107, 213, 427, ... -> A048573(k+2)

%Y Cf. A001045, A048573, A062092.

%Y Columns: A000027, A005408, A004767, A004770, A106839 for k = 0, 1, 2, 3, 4.

%K nonn,tabl,easy

%O 1,2

%A _Philippe Deléham_, Jan 22 2023

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Last modified March 28 15:28 EDT 2024. Contains 371254 sequences. (Running on oeis4.)