A049737 a(n) = Sum_{i=0..2n} (-1)^i * T(i,2n-i), array T as in A049735.
1, 17, 49, 125, 213, 361, 433, 617, 805, 1029, 1345, 1585, 1801, 2149, 2461, 2977, 3305, 3709, 4013, 4557, 5057, 5689, 6085, 6661, 7117, 8025, 8689, 9205, 10005, 10649, 11281, 12225, 12941, 13893, 14449, 15649, 16297, 17493
Offset: 0