A133497 Numbers k such that A098572(k) - A098572(k-1) = 2.

4, 7, 10, 14, 20, 27, 35, 45, 58, 73, 91, 113, 138, 168, 203, 244, 291, 345, 408, 481, 563, 658, 766, 888, 1027, 1184, 1361, 1561, 1786, 2038, 2321, 2637, 2990, 3385, 3824, 4312, 4855, 5457, 6124, 6863, 7679, 8581, 9576, 10672, 11879, 13207, 14666, 16267, 18024, 19949

Offset

1,1

Links

Table of n, a(n) for n=1..50.

Example

With b(k) = A098572(k): b(1) = 1, b(2) = 2, b(3) = 3, b(4) = 5, hence b(4)-b(3) = 2 and a(1) = 4.

Maple

for n from 1 do
    if A098572(n)-A098572(n-1)= 2 then
        printf("%d, \n", n) ;
    end if;
end do: # R. J. Mathar, Mar 13 2015

Prog

(PARI) (A=0); for(p=1, 1000, B=A; A=B+p^(1/p); if(floor(A)-floor(B)-1; print(p)))

Crossrefs

Cf. A098572.

Sequence in context: A310695 A310696 A310697 * A243909 A187334 A310698

Adjacent sequences: A133494 A133495 A133496 * A133498 A133499 A133500

Keyword

easy,nonn

Author

Philippe Lallouet (philip.lallouet(AT)orange.fr), Dec 01 2007

Extensions

More terms from Hugo Pfoertner, Jul 04 2021

Status

approved