%I #10 Mar 24 2021 15:35:58

%S 1,4,7,9,12,15,18,21,24,26,29,32,35,38,41,43,46,49,52,55,57,60,63,66,

%T 69,72,74,77,80,83,86,89,91,94,97,100,103,106,108,111,114,117,120,123,

%U 125,128,131,134,137,140,142,145,148,151,154,156,159,162,165,168

%N A bisection of A001951: a(n) = A001951(2*n+1).

%H N. J. A. Sloane, <a href="/A115004/a115004.txt">Families of Essentially Identical Sequences</a>, Mar 24 2021 (Includes this sequence)

%o (Python)

%o from sympy import integer_nthroot

%o def A342281(n): return integer_nthroot(8*n*(n+1)+2,2)[0] # _Chai Wah Wu_, Mar 16 2021

%Y Cf. A001951, A022842.

%K nonn

%O 0,2

%A _N. J. A. Sloane_, Mar 16 2021

%E More terms from _Alois P. Heinz_, Mar 16 2021