A035509 Main diagonal of Inverse Stolarsky array.

1, 7, 25, 101, 321, 1075, 3426, 9958, 30253, 92735, 253731, 739303, 2056915, 5899304, 17108660, 46137324, 130016549, 370248450, 993480845, 2766546762, 7510827752, 20798505510, 58123818148, 155141346542, 426530329383

Offset

0,2

Links

Table of n, a(n) for n=0..24.

C. Kimberling, Interspersions

C. Kimberling, Interspersions and dispersions, Proceedings of the American Mathematical Society 117 (1993) 313-321.

N. J. A. Sloane, Classic Sequences

Maple

with(combinat, fibonacci): gold:=(1+sqrt(5))/2: c1:=n->piecewise(n<>1, round((n-1)*gold), 1): c2:=n->c1(n)+floor((2*c1(n)+1)*gold/2)+1: inv_stol:=(n, k)->fibonacci(2*k-3)-1-c1(n)*fibonacci(2*k-4)+c2(n)*fibonacci(2*k-2): seq(inv_stol(n, n), n=1..30); inv_stol2:=(n, k)->(1+c1(n))*fibonacci(2*k-3)+(1+floor((2*c1(n)+1)*gold/2))*fibonacci(2*k-2)-1: seq(inv_stol2(n, n), n=1..30); inv_stol3:=proc(n, k) options remember: if k=1 then RETURN(c1(n)) elif k=2 then RETURN(c2(n)) else RETURN(3*inv_stol3(n, k-1)-inv_stol3(n, k-2)+1) fi: end: : seq(inv_stol3(n, n), n=1..30); (Ronaldo)

Crossrefs

Cf. A035507.

Sequence in context: A199116 A304421 A138729 * A332942 A247173 A141627

Adjacent sequences: A035506 A035507 A035508 * A035510 A035511 A035512

Keyword

nonn,easy

Author

N. J. A. Sloane

Extensions

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

Status

approved