The nonzero terms of S000272.
1, 3, 23, 59, 219, 999, 4063, 8103, 32603, 65439, 262079, 1047967, 2096879, 8387431, 16776431, 67107327, 134216703, 536869615, 2147482783, 4294966719, 17179868415, 34359737983, 137438953215, 549755810847, 1099511627547
1
T. D. Noe, Plot of 25 terms
Cf. S000272.
nonn
T. D. Noe, Oct 03 2014