Numbers c from the sequence S001016.
3, 7, 9, 27, 703, 937, 1249, 2223, 2463, 2919, 10087, 13449, 35655, 60975, 142587, 381727, 626331, 837799, 1126015, 1394431, 6206655, 6649279, 10507503, 56924955, 63728127, 1200991791, 1827397567, 2165804523, 2788008987, 4890328815
1
T. D. Noe, Plot of 30 terms
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T. D. Noe, May 05 2017