A328079 First differences of A328078.

1, 1, 2, 4, 6, 12, 21, 43, 78, 156, 293, 583, 1118, 2208, 4277, 8423, 16422, 32280, 63117, 123951, 242782, 476560, 934181, 1833255, 3595254, 7054600, 13837949, 27151135, 53264270, 104505920, 205027797, 402264599, 789215654

Offset: 0

Author

N. J. A. Sloane, Oct 13 2019

Keywords

• nonn
• more

Crossrefs

Cf. A328078.

Formula

Conjecture: G.f. = (4*x^11-8*x^10+4*x^9+4*x^8-8*x^7+7*x^6-4*x^5-5*x^4+2*x^3-2*x^2+1) / ((x^2+1)*(2*x^2-1)*(4*x^7-4*x^6+4*x^4-2*x^3+2*x^2+x-1)). - N. J. A. Sloane, Oct 16 2019

Extensions

a(8)-a(32) from Rémy Sigrist, Oct 15 2019