A035511 3rd column of Inverse Stolarsky array.

12, 20, 25, 38, 46, 59, 72, 80, 93, 109, 114, 127, 135, 148, 164, 169, 182, 198, 203, 216, 224, 237, 253, 258, 271, 279, 292, 308, 313, 326, 342, 347, 360, 368, 381, 397, 402, 415, 423, 436, 449, 457, 470, 486, 491, 504, 512, 525, 541, 546, 559, 575, 580, 593

Offset: 0

Author

N. J. A. Sloane

Keywords

• nonn
• easy

Links

• C. Kimberling, Interspersions
• C. Kimberling, Interspersions and dispersions, Proceedings of the American Mathematical Society 117 (1993) 313-321.
• N. J. A. Sloane, Classic Sequences

Crossrefs

Cf. A035507.

Programs

Maple

tau:=(1+sqrt(5))/2: 12,seq((2*round(n*tau)+1)+3*floor((2*round(n*tau)+1)*tau/2)+3,n=1..69); # C. Ronaldo (aga_new_ac(AT)hotmail.com), Jan 01 2005

Formula

a(n) = (2*round(n*tau)+1) + 3*(floor((round(n*tau) + 1/2)*tau)+1) for n > 0 and a(0)=12, tau = (1+sqrt(5))/2. - C. Ronaldo (aga_new_ac(AT)hotmail.com), Jan 01 2005

Extensions

More terms from C. Ronaldo (aga_new_ac(AT)hotmail.com), Jan 01 2005